[6]

(1

Buenos Ayres—

The Fossil Shells from this locality are either well known among recent species from the same locality or in so incomplete a condition that they cannot be identified. They are

1 Mactra, — numerous specimens, but in bad condition

2 Venus flexuosa

3 Cytherea, — several specimens, too imperfect.

4 Potamomya labiata

5 Ostrea, — generic character alone distinguishable.

6 Buccinum globulosum

7 Oliva patula: the difference between these and the living shells is so slight, that it cannot be regarded as specific.

[7]

Upraised Shells, Copiapo, Chile.

1 Mulinia Byronensis Gray. (no. 846.)

Upraised Shells, Chiloe.

1 Venus costellata Sowb: Zool. Proc.

2 Odd valves of an Ostrea, quite destitute of distinguishing mark; they may be young shells of O. latissima Desh: or only O. Edulis Linn. (no. 535.)

Upraised Shells near Valparaiso.

1 Concholepas peruviana (no. 145. 146.)

2 Fissurella biradiata

3 Trochus, not yet named but well known & very common no. 150.

4 Mesodesma donaciforme Desh. (no. 242.)

5 Balanus not yet named, but very common on all the coasts of Peru.

6 Fragments of Mytilus Chiloensis

[8]

Patagonia

X Ostrea latissima Deshayes Coquilles Foss. des Env: de Paris t. I. pl: 52. 53.

Upraised Shells, Patagonia

[in margin, in pencil for items 1 and 2:] Bahia, Brazil

1 The Fossils of this locality are composed of three separate parcels, probably different epochs, viz.

1 A granular Limestone (no. 381.) containing two fossil species; one, by far the most abundant, probably a Melania, the other probably a Paludina

2. Coarse Siliceous Sand (no. 342 & 378) with fragments of a Cytherea, a Pectunculus, an Oliva, a marginella a Cypræa, a Terebra and a Madrepore, all probably the same as recent species. I think two specimens of a Vermetus that are associated with there are really only living shells of the present time.

3 Shells of recent species living at the present time in the neighbouring Seas: viz. Mytilus Magellanicus Lam.; a Mytilus not described; Patella deaurata Lam.

Voluta aneilla Lam.; Fusus Magellanicus, (Murex Lam.) are a variety of the same; and a Balanus, probably B. Fulipa.

[9]

fissure

3 Cast of the inside of a Cytherea

4 Fragments of a Pecten. P. rudis (now described)

[10]

Turritella ambulacrum. — [pencil addition:] I only say not same with S. Cruz proper to call it. T. Patagonica

Many specimens, some of which are rather variable in external characters, and all imbedded in a light grey friable Sand, described under St. Cruz shells. —

[11]

(3

Lewis & Clarke's Travels

Page. 139. between Latitude 47 & 48 & about 102 West of Lima saw quantities of Lava & pumice stone is not a geologist. —

[Lewis, Meriwether and Clark, William. 1814. Travels to the source of the Missouri River and across the American continent to the Pacific Ocean, performed by order of the Reading notebooks 537 government of the United States in the years 1804,1805, and 1806. By Captains Lewis and Clarke. London.]

[12]

see Santa Cruz p. 9.

This may possibly be distinct from the Natica solida of Navedad, Chili; it is however obviously impossible to be certain, seeing that no part of the outside of the Shell remains—

[13]

4 Venus nearly allied to exalbida Lam. meridionalis D'Orb.

[pencil addition:] meridionalis is it described in his work?

5 Tellinida P. oblonga

[14]

I suppose this to be Natica Cruziana D'Orb: no part of the outer surface remains & therefore it cannot be described

St Cruz

[15]

Navedad, Chili

Turritella carinafera Desh.

a fragment of a Shell which I believe to be of this species.

[pencil addition:] thinks not proper Chilensis. At Huafo there is a Turritella which in list he calls Chilensis in paper Huafosis

at Mocha there is T. chilensis!!

Navedad, Chili

[16]

Fusus subrecurvus. [pencil addition:] Cleryanus d' Orbig. Palæont

Fusus, testa oblongâ, anfractibus seris, spiraliter striates, et longitudinaliter costatis, striis confertis, costis obtusis, posticicè interruptis; suturâ distinctâ; canali mediocri, subrecurvâ; long 0.65 lat. 0.3 poll

A single specimen. I do not know any recent species that nearly resembles it.

[17]

New Bay

Northern coast of Patagonia

1 Cast of a Lucina (no. 370

2 Pecten asper

3 Corallina coating Turritella

4 [Mesotella] Madrepore

5 Scutella, probably new species

[18]

(1 (a)

Upraised from an inland Bed; Maldonado

From this locality there are only four species, viz

1 Potamomya labiata

2 Solen caribæus Lam. (Solecurtus DeBl.)

3 Mytilus, fragments

4 Assiminia or Paludina} 1312

[19]

(2

St. Fe. Bajada Upper part of the River Plata

1 Ostrea Bellovacina Desh: t. 50. f. 6. (no. 580)

2 Ostrea Virginica Lam: (no. 568. 569.

3 A Pecten resembling asperrinus; but as the internal surface alone can be seen, it cannot be positively identified. (no. 571. 570)

4 Cast of a Tellina

5 Casts of a Venus? (no. 584)

6 Two old valves of an Arca, (both imperfect) which cannot be distinguished from A. inæquivalvis Lam. (no. 579)

7 Venus lamellifera, testâ subovatâ, gibba, latere postico longiore, antico brevi, sub umbonem sinuatâ; superficie striis radiantibus (nonuuquam duplicatis,) lamellis concentricis elevates ornatâ: margine dorsali planulatâ, striatâ; impression anticâ cardiformi, latâ: long. 1.7, lat. 1.1, alt. 1.4 poll.

This beautiful species resembles Venus cancellata Lin. most nearly; it differs from that species in being much more ventricose, in having the anterior impression deeper and in the greater development of the concentric lamellæ, which are deeply striated from the base to the outer edge on both sides. Found in a loose sandy bed. It is possible that the casts mentioned above may belong to this species. (no. 578.)

8 mass containing a cast of an area or Cucullæa (no. 567)

[20]

(3

St Joseph's Bay

North Patagonia

[pencil addition:] + a cross — This mark means to be reconsidered

+ (V) Pecten asper, Min: Con: t. 370 f. 1 Paranensis, D'Orb: Voyage Pal. and Pl. IV III f. 30 of this work

[pencil addition:] Pecten Paranensis D'Orb

[text excised] more numerous

[21 (a)]

(4

Port Desire, Patagonia

Cucullæa alta PL. II f. 22, 23

[pencil addition erased:] Sowerby thinks is Arca

The specimens from this locality are larger than those from Santa Cruz.

[21]

Port Desire, Patagonia

A fragment of the hinge of a Bivalve, probably a Cyprina; the specimens show the beak, the fulcrum for the ligament and one large tooth, but is otherwise so incomplete that we cannot be certain to what genus it belongs.

[22]

(8

Port St. Julian, Patagonia

Struthiolaria ornata

Besides the species described there are the following from this locality.

Pecten asper Paranensis Sowerby Min: Conch: t. 370 f. 1.

Cast of a Cardium, very indistinct.

Cast of a Bivalve, supposed a Cyprina, from its not having any siphonal scar in the palleal impression.

Another cast of a Bivalve, supposed to be a Corbis from the umbones being nearly central Terebratula variabilis Min: Conch: 576 f. 2 to 5. Patagonica d'Orbig

Casts and fragments of Turritella ambulacrum nob:

[For readability, the crossed section is left undeleted]

[in margin:] thinks near but perhaps not lamellosus. x

Fusus lamellosus, (Murex lamellosus Lam.) The specimens of this shell are unusually large; they appear to connect Fusus magellenicus with F. lamellosus, being of a more elongated form than the ordinary variety of F. Magellanicus, but still having the varicies acuminated posteriorly.

Cast of a Pyrula resembling P. destans nobis, also resembling similar to P. ventricosa Mr. S. thinks not distinguishable Sowerby Tank Cat. / says new species & not distans

Scutella

Ceriopora verrucosa? Goldf. t. X. f. 6. formed upon a spiral Shell.

Turritella ambulacrum

[23]

(9

St. Cruz, Patagonia.

Not only does the Mineralogical character of this bed, but also several of the Fossil Shells contained in it resemble that of Navedad, Chili, but several also of the Fossil Shells contained it in it, are identical with those of that bed.

The Shells of this bed are in a very imperfect state of preservation, so that it is difficult to characterize or identify them; two or three are however remarkable & distinct enough to be described.

Those resembling the Navedad species are

1 Voluta alta PL. IV f 75 of which there are two casts with scarcely any remains of the shell; these casts are however interesting because they show more the form of the anterior part of the Shell.

2 Trochus collaris, PL. III f. 44, 45 of which there is a single specimen th which has lost all its pearly lustre.

3 Natica solida PL. III f. 40, 41 several specimens very much disguised, because

[24]

(14

St Cruz, Patagonia

The following are two imperfect to be described.

1 A Byssonarca, somewhat similar to B. Noæ, two fragments.

2 An Artemis

3 A Cardita name described as Cardita patagonica D'Orb.

4 A Venus nearly like the recent V. plicata Lam. which is found on the West coasts of Africa.

5 A Venus slightly resembling V. fasciata montagu, which is common on the British Shores.

6 A Cardium with very delicate close=set radiating lines, Card. Puelchum D' Orb: is now described

7 A Bivalve, probably a mactra, its genus however cannot be decided, because its hinge cannot be displayed. Is now called Mactra Darwinii D'Orb.

8 A fragment of a Crassatella, now described as Cr. Lyellii D'Orb.

9 A Bivalve, probably a Tellina.

10 A Serpula.

11 A Fusus nearly like despectus in its proportions and general form, but which has had obtuse longitudinal ridges somewhat similar to those of Buccinum undatum.

[pencil addition:] Mactra rugata & Cucullæa Mr Sowerby thinks these are two species of natica from this place & will reexamine whether one is the N. solida of Navedad.

[25]

(15

Chonos, Archipelago

All that can be distinguished in this bed is a fragment of volute, too incomplete to be identified; two fragments of Turritella suturalis (vide Navedad, Chili); and an imperfect specimen of Sigaretus subglobusus (vide Navedad, Chile).

[pencil addition:] (specimen at home)

[26]

(16

Valdivia bed

The fossils of this bed are in such a completely decomposed state, that it is only possible to enumerate the generic names: they are

a Solen

A Novaculina

a Cytherea

a Crepidula

a Mytilus

[27]

(20

Chiloe, East coast.

Besides the four species described, all that can be in any manner identified from this locality are,

a Fragment of a Solen and

A fragment of a Bivalve, probably a Cytherea

[28]

(24

Huafo.

The Shell which appears to abound most in this bed is identical with the recent Turritella cingulata (Sowerby Tank. Cat.) [pencil insertion:] thinks not proper T. Huafonsis yet labels it Chilensis which is found in great profusion at Valparaiso and at Coquimbo. All the Shells of this bed are tender & fragile and they are imbedded in a soft friable Sandstone. Besides this there is a small & very imperfect specimen of what I suppose to be Venus thinks new species exalbida Lam. and a valve single valve of one of the acephalous mollusca, which is too imperfect to allow of its genus being determined.

[pencil addition:] (a slip under St Julians about this Turritella

[29]

(25

Concepcion

(nos. 161. 165. 169. 168)

Trigona undosa, Hametiana d'orbig Palæot testa ovato=subcuneiformi, crassa, latere antico brevi, robundato, postico producto, sub=acuminato; a anticâ parte rugis elevatuisculis, irregularibus, obliquis, varicosis, intructâ, ponè mediam oblique terminautibus, instruct; postica parte lævi, lincis incrementi solùm exhibente, carina obtusâ ab umbomen usque ad marginem inferiorem posticam decurrente; long. 4, lat. 1.5, alt. 2.7 poll.

This species, which we do not find represented either by De Buch or Lea, resembles var β of Trigonia gibbose Min: Con: t. 236 most nearly, which belongs to the Portland Oolitic Beds of Tisbury. It may however be readily distinguished from that species, by its less gibbous form as well as by the different form & structure of the rugosities on the two thirds of the anterior surface. There are several casts of the same (numbered 163. 164. 171.)

Concepcion

Baculitis vertebralis Lyellii nov. spec (Nos. 162. 164. 174.)

May not the occurrence of this genus be regarded as confirmatory of De Buch's opinion that these beds belong to the Cretaceous group?

[30]

(26

Concepcion

Nov 45 // With respect to the two casts of the Pecten Mr Sowerby can say no more than that they are Pectens

Nautilus (no. 170)

This cannot be regarded as Nautilus simplex of Min: Con: t. 122, because there is in this a small lobe near the commencement of the chambers, in which respect it slightly resembles N. sinuatus Min: Con: t. 194.

It is apparently an intermediate form, but the specimen is too imperfect for description. —

[pencil addition:] says doubtless new species

Cast of a mactra? (no. 167) [pencil addition:] Araucana d'orbg Palæot

Imperfect valves of a Pecten? (no. 172) [pencil addition:] true species

Natica Gibboniana? [pencil addition:] Australis d' orbg Palæot Lea Amer. Phil. Trans. new series vol. vii, p. 256 t. 9. f. 10. a very incomplete specimen. (no. 173)

Besides the above there is a cast of a large Bivalve, in so indistinct a condition that it is not possible to ascertain its genus (no. 160)

[31]

(27

Navedad, Chili

The Fossil Shells of this locality present a general resemblance in external appearance to recent species of tropical & infra-tropical forms: but a particular examination of them proves nearly all of them to be specifically distinct from any recent species with which we are acquainted up to the present time. There appears among them one which may be regarded as the present at the [illeg] The imperfection of the specimens will in several instances render it impossible to detail the whole of their characters.

Besides these which I have been able to describe there are some few in so incomplete a condition that I can only conjecture the genus to which they may belong. I /over

[27v]

add a list of these, and of one or two others which must be regarded as doubtful species.

Cytherea, somewhat resembling C. Erycina; but no part of the external surface remains.

Venus, nearly allied to exalbida Lam. meridionalis D' Orb. nov spec

Artemis, Gray, a single valve probably belonging to this genus.

Mactra, a few small single valves. — nov sp

Pecten, a small single valve.

Teredo, small fragment of a tube

x Bulla, a fragment

x Monoceros nov spec or Purpura, a fragment of the posterior part.

Bulinus granulatus

x Pectunculus dispar? Defr. abundant. says not dispar — [illeg]

[31v]

Pectunculus, Navedad, Chili may possibly be distinct from P. dispar of Defr. it agrees however so well with the description that it would not be prudent to describe it as distinct.

[32]

(40

Coquimbo (older series)

There is also a gigantic system like those of Patagonica

therefore not

1 Venus opaca Brod: & Sow. (young Shells)

+ 2 Artemis ponderosa — commonly called

thinks a Lugina alike lævis nov spec vide exempl. showing it to be a true artemis

Venus concentrica, though sufficiently distinct from the true Artemis or Venus concentrica; but also well known as a recent S. American species: it is proved to be a true Artemis by the pallial impression

3 Natica duplicata Wood says no agrees it is intermediate

[illeg] Lutraria

Besides the above, which cannot be distinguished from recent individuals there is a bivalve in such imperfect condition that it is not possible to ascertain whether it be a Mya or Lutraria; and also a univalve resembling a Buccinum. Also a gigantic oyster like those from Patagonia.

Coquimbo (older series)

Perna maxillata Lam. Gaudichandi d' Orbg PL.

There are several large specimens of this species which has only been known hitherto in a fossil state; and which is said to have been brought from America by Lamarck, though he gives no precise locality. I have it from the vicinity of Turin in Piedmont.

Coquimbo (older series)

Bulla Hydatis Ambigna d' Orbig PL. 12

There is a cast of a Bulla, which agrees in shape & thickness with our common Europæan Bulla Hydatis, being however only a cast it is impossible to ascertain with certainty whether it be the same or to describe it if different.

[32 (a)]

Perhaps not Venus opaqua

it is however impossible to tell what genus to belongs to — attempts having been newly made to get at its hinge, without success. G.B.S. [Sowerby]

[33]

(41

Coquimbo (older series)

Cardium rude. Auca d' Orbg. Pt. 12 f. 1-3

Cardium, testâ suborbiculari, crassâ, radiis 40, rotundatis rugosis, [illeg] posterioribus angustis, confertis, cæteris subæqualibus; interstiiis angustis: long. 2.25 lat. alt. 2.25, lat 1.8, poll.

The general appearance of this species resembles that of our common Europæan Cardium tuberculare; the number of radiating ribs is however nearly double and the interstices are much narrower & not rugulose.

Several specimens embedded in great blocks of very hard stone

[pencil addition:] M d' Orbigny speaks of a gigantic oyster found in mainland in front of Mocha

[34]

(42

Coquimbo (older series)

(collected by Covington or lower part of the intermediate Bed

The fossil Shells thus designated are

1 Sutraria?

2 Mytilus, identical with Mytilus Chiloensis

3 Casts of a Crepidula

4 Casts of a Turritella

5 Casts of an Oliva?

6 Cast of a Cassis?

7 Cast of a Cytherea

8 Five specimens of Monoceros cariniferum.

As these shells were not collected by myself, though under my direction, I cannot be positive of their allocation

They are embedded in sandstone & do not resemble in state those from the upper series.

[35]

(43

Coquimbo 2844.

(Intermediate Bed) close under the calcareous beds.

The few fossil Shells which bear this number are

1 A species of Ostrea, very imperfect & much worn, so that it is quite impossible to specify it.

nov spec. [2] Fragments of a Mactra Pecten, not quite sufficient probably an undescribed species, but the fragments are quite insufficient.

3 A cast of the inside of a Natica.

4 A Balanus, much worn and adhering to a worn specimen of a Monoceros; it appears, as far as I am able to judge from such worn specimens to be identical with a species which now lives in great abundance on the neighbouring coasts.

5 A group of fragments of Balani, similar to one belonging to many of "Coquimbo, intermediate bed" which see.

6 Several specimens of Monoceros [illeg] cariniferum described among the fossils of "Coquimbo, [illeg] intermediate bed."

[pencil addition:] [text obscured] species of Monoceros

The shells of this lot, were my belong to the "intermediate bed" but were associated with the great Perna

d' Orbigny alludes to an America no. spec seem lost

[36]

(44

Coquimbo intermediate Bed. Coquimbo intermediate bed

The fossil shells from the bed thus designated are

1 A species of Ostrea in very imperfect state

[37]

(45

Coquimbo intermediate bed

Monoceros cariniferum Blainvillii d' Orbg. PL.

Monoceros cariniferum testâ ovato subglobosâ, crassiuscula, lævi, spirâ plerumque brevi, nonnunquam, levatiusculâ; anfractibus quinque, carinatis, ultimo maximo, 1-2-vel3-carinato, carina posticâ validirri, constrante; aperturâ ovatâ, posticè extus angulifera, dente antico breviuscula.

This species, which varies greatly in its form, as well as in the number and distinctness of its carinations, is decidedly identical with that in bed marked "Coquimbo 2844. One young specimen has scarcely a trace of a keel, this individual is moreover very thin.

[38]

(46

Upper series & lower plain (Coquimbo) (lower plain)

It is more possible that some of these shells belong to upper plain

NB I must see to species [mainly] Specimens 2924 seem overlooked

Pecten purpuratus Lam.

The fossil Pecten which occurs in this locality, resembles very closely a recent species, which is common at Coquimbo and to which we find the name Pecten purpuratus Lam. attached in the British Museum.

I cannot however regard this as decidedly the P. purpuratus of Lamarck, and as I have never had an opportunity of comparing it with the specimen in Lamarcks collection, I am unable to decide: in the short character which Lamarck gives of his species there are two circumstances in which it differs from our recent species from Coquimbo, which are the number & convexity of the rays.— Lamarck in his character of P. purpuratus says that it has 26 convex rays, whereas in our Shell the rays are 22, and all very nearly flat. With regard to the locality, D gives much obscure that that Lamarck speaking of his P. purpuratus says "Habite les mon orientales et australes"; and afterwards "On le dit du Japon." neither of which localities accords with that of our Shell. On other circumstance contributes, with those already mentioned, to render it doubtful in my opinion whether our Shell be the P. Purpuratus of Lam. for our Shell has a remarkable character which is not noticed by Lamarck; it is this, /over

[48v]

when our Shell has reached a diameter of about two inches, a small interstitial ribs makes the appearance between each of the principal ribs, which interstitial ribs become quite distinct when the Shell has arrived at a diameter of 3 1/2 inches. Supposing however that the recent species in question is the P. purpuratus of Lamarck I have now to state that the fossil resemble it very nearly in every character, differing only in having the principal ribs more convex, the interstices narrower and the ventral points of the interstices obtusely bidentate instead of being only obtusely quadrate.

[38v]

(49

Coquimbo

Upper series

No 2789

[in margin CD:] yes

1 Venus opaca Brod. & Sow. Zool. Proc.

2 Mulinia Byronensis in fresh shells & fossil from Copiapo Gray Nat. Hist. Mag.

3 Turritella cingulata Sow. Tank. Cat.

+ 4 Erycina Mesoæsma donaciformis, is it same as (Mesodesma? donariforma)

5 Calyptræa Byronensis Gray

6 Monoceros costatum Sow. Pecten purpuratus

These are all the species I find under this allevation; none of them are in very good condition; I find nothing to distinguish them from recent species; they come from the same upper series. —

I say and Tropus donaris with tint of colour / over

[49v]

See back of 47

[38v]

[pencil addition:] I must the species

Venus Chilensis

Slight differences are observable between the fossil & recent specimens of this species, they are not however greater than may be observed in different recent individuals of the [illeg]from the same locality.

[39]

(50

Payta, Peru

Only two fossils are from this locality, namely Pectunculus transversus Lam. & Ostrea Virginica Lam.} given me

(If you have not this Pectunculus pray keep it.)

[40]

(51

Cordillera of Copiapo

Northern Chili

In this locality are the following

1 Pachyodon, very closely resembling Unio Listeri of Min. Con. t. 154 f. 1.3.4. which belongs to Strutchbury's genus Pachyodon. The specimen appears to have lost its external surface, so that if really distinct no character remains to distinguish it by.

2. Lima very nearly resembling the shell called Plagiostoma rusticum Min. Con: 381. but probably distinct; the fragments however are not sufficient. (65)

3 pecten alatus Debuch loc. cit. (59)

4 Perna quadrata var: Phillips Yorkshire Part. I t. X. f. 21. 22 (66)

5 Gryphæa incurva Min. Con: t. 112 f. 1. 2. (64.58.)

6 Spirifer linguifera [Insertion:] Rio Claro Chile Phill. Yorksh. Part 2 t X. f. 4 (977)

7 Terebratula tetrabedra Min: Con: t. 83. f. 4 (no. 133)

[Insertion:] from Chanuncillo N. Chile

8 Terebratula obsolata [Insertion:] valley of Maricongo & Rio Claro Min: Con: t. 83. f. 7 (no. 132. 73. 127)

9 Trochus Humboldtii (Pleurotomaria Humboldtii DeBuch Petris. receuill. en Amerique par Humboldt p. 9 f. 26. This is not a Pleurotomaria. (no. 60. 61. 110)

10 Avicula echinata Min. Con. t. 243. f. 1.

[41]

(52

Guasco Alto

Cordillera of Northen Chile

From this locality there are several species of Terebratula. It is well known that many species of this genus are very variable in the forms they assume, which renders the determination of them exceedingly difficult. Thus among 24 specimens which I believe to be merely varieties of the same species, there are some agreeing very nearly with T. hastata Min. Con: t. 446 f. 2.3, other like T. triquetra Min. Con: t. 445 f. 1, others like T. biplicate Min. Con: t. 90 and others again resembling T. ornithocephala Min. Con: t. 101. f. 1.2.4 while some bear a not very distant resemblance to T. emarginata Min. Con: t. 435. f. 5. It is more than probable that several of the above named are merely varieties of growth or age of the same species: perhaps all except hastata might properly be regarded as varieties of T. ornithocephala

Next to this come numerous varieties and various stages of growth of Terebratula obsoleta Min. Con: t. 83 f. 7.

Besides these there is one resembling T. Lens Hisinger Lethæa Suecica tab. XXIV. f. 6 (number 40 from Iquique) which also closely resembles a recent species from the Coast of Peru.

one specimen of Terebratula Pleurodon Phillips t. 12 f. 26. (no. 39.)

A Spirifer resembling Spirifer funguis Min. Con: t. 271.

Phillips Geol. of Yorksh. t. 9 f. 18.19 and only differing from it in having two or three small ridges of one valve & corresponding depression of the other valve.

A Lucina resembling L. concentrica and

One specimen of Trochus Humboldtii (Pleurotomaria DeBuch)

[42

(53

Cordillera of Coquimbo

No: 781. 782. 783. 784. 785. 787 & 978.

Pecten alatus DeBuch Petrifications recueillies Amerique par Humboldt &c p. 3. f. 1.2.3.4.

There is no doubt that several specimens in this collection belong to this species, although the striæ mentioned by DeBuch as rising into little scales on the ridges are not evident in these specimens which are entirely deprived of the outer surface of the Shell. The general form of the Shell, however, as well as the number & form of the ridges and interstices agree with BeBuch's species. Our specimens are remarkable for having the Shell in a great measure replaced by Calcedony in irregular concentric globules similar to those which compose the Beckite found in the Limestone of Torquay.

Cordillera of Coquimbo

No. 77. 778. 779. 780.

Exogyra sinuata? Min. Con: t. 336 where it is called Gryphæa sinuata. The specimens are very incomplete, it is however probable that they belong to this species.

[43

(54

Cordillera of Coquimbo

Ostrea hemispherica

Besides the above I find the following from this locality

Gryphæa dilatata (786. 788.)

A species of Orthoceratites, very incomplete (945)

A Madrepore probably of the genus Astræa. (979)

[54v]

2780 Large Gryphæa — very like & probable identical with Gryphæa orientalis ([illeg]) in the Geological Society's collection from the South of India—

[44

(55

Cordillera of Central Chile

The few fossils belonging to this locality are all very indistinct, the following indications are therefore all that can be given

Lucina? (no. 618) Peuquenes

Exogryra — (no. 615) Peuquenes

Cucullæa? — (no.750) [Cumbre]

Ostrea — (no. 752) Cumbre

Crassatella? (no. 614) Peuquenes

Gryphæa dilatata? (no. 617) Peuquenes

Ammonites? something like A. Vanuxemensis Lea, but too indistinct and only a small fragment.

Natica Gibboniana" Lea (no. 613) Peuquenes

Terebratula? — (no. 611) Peuquenes

Certithium? — (

[45]

(57

Upper chains of Tierra del Fuego

2. Ammonites? irregularis, testâ costellis radiantibus, numerosis irregularibus, à tergo dichotomis ornatâ.

This appears to be very distinct from any described or figure by DeBuch or Lea. It is however only a fragment, so that its general shape cannot be ascertained, nor can we be certain that it is an Ammonite. It is very much compressed.

No. 803. 804. 801. 802