266 THE ANTARCTIC MANUAL. 
The ANISOPLEUROUS GASTEROPODA are represented by the follow-. 
ing forms:—(i.) Fusus (Neptune) setosus, Wats., at stations 146 and 
147, with a thin, white shell. (ii.) F. (Weptunea) calathiscus, Wats., 
at station 147, is possibly the same species as the preceding. The 
genus belongs to the family Fascrozanun#, (iil.) Plewrotoma 
(Sureula) staminea, Wats., from stations 146 and 149; and (iv.) 
P. (Plewrotomella) papyracea, Wats., from station 147, with a shell 
as thin and delicate as tissue paper, belong to the family Covzpz. 
They are so far typical deep-sea forms as to have lost their eyes. 
(v.) Guivillea alabastrina, Wats., formed the type of a new genus of 
the family Vozvrmz. It was taken at station 147, and is described 
as “a typical Voluta.” Its eyes, though present, are functionless, 
since they are destitute of pigment, and the retina, lens and optic 
nerve are degenerate. This animal is said to be “one of the 
greatest Molluscan treasures” procured by the Challenger. Its shell, 
some six inches and a half long, is as white as alabaster. (iv.) Tro- 
chus infundibulum, Wats., of the family Trocam.x, taken at station 
146, and again at the Bermudas. This animal possesses well 
developed and apparently functional eyes, which do not differ from 
those of its littoral congeners. This is an exception to the general 
rule, that deep-sea Molluscs have no, or very poorly developed, eyes. 
On the whole the Antarctic fauna illustrates well the general 
view that Molluscs from the deep sea are of moderate or smallish 
size, with thin, delicate and fragile shells. In colour they are incon- 
spicuous, and, as a rule, pale and uninteresting. They are of neces- 
sity carnivorous. <A large proportion are blind. 
Class III.—Scapnopopa. 
No species was taken inside our area, but just outside, at station 
160, Dentalium leptoskeles, Wats., was dredged. It shows a deep-sea 
character in the extreme attenuation of its shell. 
Class [V.—CEPHALOPODA. 
Three species, belonging to as many genera of Cephalopods, came 
up with the trawl after a deep sounding in the Antarctic seas. They 
were :—(i.) Cirroteuthis magna, Hoyle, taken at station 146 and, out- 
side the area, at station 298, off Valparaiso, of the family Crrorzv- 
ruipx. (ii.) Bathyteuthis abyssicola, Hoyle, taken at station 147, of 
the family Ommasrrerum.s, (iii.) Lledone rotunda, Hoyle, from sta- 
tion 157, and again from station 298, outside the area, belongs to the 
family Ocropopiwx, 
