44.

Family Muridæ — hairy 6 rooted molarsin each jaw —

G — Reithrodon — distinguished by the upper incisors being grooved in the centre.

1. Cunicoloides 2032 S. Cruz Patagonia

2. obscurifrons 1284 Maldonado

3. xanthotis 1755 & 1695 Patagonia

4. 978 I think is a new Distinct species do

Genus Mus

Subgenus Phyllotis, teeth differ from true rats — tail long, ears larger —

1. Darwinii 2830 Coquimbo

2. longicaudatus 1472 Patagonia

3. pallescens 2033 — 1694 — 1693 Patagonia

Section —

Mus tumidus 1285 Maldonado

— obscurus 1265 Maldonado

Section

nasutus 1287 Maldonado

Section

1. pilosus 2831 Coquimbo

2. olivaceus 2206,2832,2833 Coquimbo

3. micropus 2834 S. Cruz

4. brachiotis 2432 & ?2433 Chiloe

arenarius 1288 Maldonado

5. Xanthorhynus 2035 S. Cruz

6. flavitarsis 1232 1002 T. del Fuego

7. leucophæus canescens 1696 Port Desire

8. pygmaeus 1342 Patagonia R. Negro

[note to 1285-1342:] All these species appear to be closely allied— They are mostly of small size— between that of a mose & Rat — differ from the typical rats or mice, if we take the common English species as our guide, in having very long soft fur short hairy tails hairy— hairy ears— and the folds of enamel in the teeth more complicated—

Section

bimaculatus 1289 Maldonado

fragilipes Maldonado

Section

flavus 1290 Maldonado

elegans 777 Maldonado

Magellanicus St of Magellan

arenarius 1288 Maldonado

brevirostris 1237 Maldonado — typical mouse

[note to 1289-1237:] These are more closely allied to the common [illeg] These appear to be immediate between the above species & the common mice— if we except M. bunaculatus they all have tolerably long tails—

Section

maurus 1280 Maldonado } typical rat.

Section

fulviventer 1457 Bahia Blanca } folds of enamel in the teeth more complicated than in common rat, fur long- tarsus larger tail long nearly naked

[44v]

One may observe in the foregoing list that, the Patagonian & Chilian ones though distinct species generally go together, & that the Maldonado have likewise one character a character somewhat peculiar to itself.—

It is remarkable that the long tailed mice which approach the character of old world ones are found on Eastern side. — With this view where will (gracilipis in spirits comes) also that from swarms of Concepcion, & Galapagos

There are twenty four species of mice (leaving out red set of Europe & known mice of Maldonado) to this must be added gracilipis — reithrodon from St of M & one from Concepcion swarms.

 

Specimens in Zoolog Collect

Species known from S America

Longicaudatus

About 13 more south of the Tropics, including Azara [circled]

From about the Tropics

= 40 all together