286

Chonos Archipel

1834 Decembr

Planaria organ.— This footstalk is much longer than in the land Planariæ, as the is the organ which is here nearly cylindrical.— indeed when fully extended, from base of footstalk to mouth it is one slightly tapering line.— hence the distinction is almost superfluous, being only seen when the organ is within body: it is here remarkably long, so that the animal can twist it over his back & hang over on the on one side & it will then project on the other. Weak Spirits of wine always caused the protrusion; shortly before death generally is retracted; is present & highly developed (so are the middle, lateral, branching vessels) in very young specimens.— I saw once a quantity of granular matter ejected from this organ, the animal being placed in [illeg] Spirits of Wine.— The vascular system is continued in a perfect ring some distance from the margin of animal, round the posterior half of body.— On each side of the central anterior vessel & between the branches, there about 7 or 8 circular cavities, which contain an opake spot.— (I never before saw this in the genus). Not all the Individuals nor or very young ones possessed them.— the anterior ones were best developed.— I have some slight suspicion, they are ovules; it is rendered probable by the [illeg] number of exceedingly young specimens found with the old ones.— On the under surface I most carefully tried to see the 2d or posterior orifice; but quite failed; there is however a transparent spot just at (B).— One specimen being placed in strong Spirits of Wine, the "organ" burst forth through the circular dorsal clear space.

287

Chonos Archipel

1834 Decembr

Planaria This must have been accidental, as by careful examination no orifice can be seen there.— This specimen is preserved & well shows the "organ".— A system of vessels sometimes lines the inside of ring by (B).— The drawing represents the organ, partly protruded.— The connection of organ & anterior central vessel (& hence whole vascular system) is very evident.— The organ & footstalk lie coiled up as represented in the clear space.— The motions of the "organ" are as described in Land Planariæ.—

Lichen= Conferva 2377 Plate 14: Fig. 4 much magnified copied Consists of bunches of slightly branched hairs, colored "Reddish orange"; grows commonly on the dead twigs of trees, here at Chonos & in T. del Fuego.— The hairs when examined in cabin (from hygrometrical properties?) moved & started.— The hairs have their extremities rounded — truncate.— when examined in water, seem to consist of an outer vessel, containing an inner with red fluid; this fluid is divided transversely, apparently in very same manner as the green matter in conferva.— each compartment contains is composed of 3 or 4 little sphæres of the red matter, which either only touch or run into each other more or less.— On the hairs there are irregular lumps which contain a particle of the red matter, separate from the column.— These are buds & thin young branches may be seen rising from them.—

288

Chonos Archipel

1834 Decembr

Holuthuria 1099 In brackish water, adhæring to small stones, in the figure of an Ascidia.— Length 11 inches; apparent diameter 10 3/4 inch: when fully inflated, circumference 5 & 1/2 inches.— Body cylindrical, slightly tapering to each extremity.— Whole surface most thickly strewed with short, cylindrical, truncate papillæ. These closely examined have no orifice; may consist of a reddish colored, slightly convex cushion on transparent footstalk, which contains [illeg] other ligamentous tunic, by which perhaps the cushion is made to act as a sucker.— Upper surface "Hyacinth & Art-blood R" shading at each extremity into white, lower surface & posterior extremity sooty.—

Anterior extremity, tentacula, & mouth, dark greenish black.— broard.— mouth projecting, surrounded by 10, placed in pairs, large tentacula. These in shape are thick conical (not at all flattened) rest on cylindrical base, throw off short cylindrical branches with nobs or buds on them.— Within these are 5 pair of much smaller ones, bluntly conical, bush-like, fine, tops colored white.— Absorbs much air, sensitive of light & much irritated by warm breath: often sends a ring of contraction down whole length of body.— The mouth is withdrawn by the interior part of animal being turned outside inwards.— I omitted, that the surface or patch by which the body adhæred, was void of papillæ, it appears as if they had been removed by the friction.—