” GASTROPODA. 7 
which the hairs are arranged in spiral, longitudinal series. Spire not raised above 
the last whorl; whorls 44, very rapidly enlarging, separated by a deep, channelled 
suture; first 24, the protoconch, white, shelly, smooth, convex, not covered with 
periostracum ; the last very large, inflated, slightly descending anteriorly ; aperture, 
large, subcircular, brown within ; peristome thin, continuous, the columellar margin 
slightly reflexed. 
Greater diameter, 29 millim.; lesser diam., 20°5 ; height, 19 millim.; aperture, 
about 16 millim. in height and width. 
Operculum (fig. 7c) small, horny, reddish, lamellar, marked with fine lines of 
growth, and having the nucleus lateral and marginal. Length, 7 millim.; width, 5-5. 
Off Coulman Island, 100 fathoms, one adult specimen; off Mount Erebus, 500 
fathoms, one young example. 
The much-contracted animal is of an uniform light reddish colour in spirit. Edge 
of mantle fringed, finely subpapillate, the papillae being grooved above. Head produced 
into a long, non-retractile, pointed, annulated rostrum, which appears to be divided 
above down the middle by a groove, which starts at the front part of the head between 
the tentacles. The latter short, conical, pointed, laterally compressed, with the sessile 
eyes at their outer base. Foot moderate, with a double margin in front, and with a 
distinct groove above the side and hind margins. Penis moderate, behind the right 
tentacle. 
Radula (fig. 7b), 2, 1, 1, 1, 2, of a brown colour ; central tooth quadrate, acutely 
unicuspid, laterals wider, subquadrate, with a single long, smooth cusp; marginals 
simple, hooked or curved. 
This, perhaps, is the most interesting Gastropod found by the Expedition. It 
at once stands out as distinct from anything hitherto obtained from the Antarctic 
region. The shell, which is quite flexible and tough, like a chestnut skin, and the 
beautiful hairy periostracum are the two main characters of this very remarkable 
species. 
The shelly protoconch, which is succeeded by the soft, flexible lower whorls, is 
most unusual, and the reverse is much more common. For example, the protoconchs 
in “The Tritons,” Doliums, Purpuras, and other groups are more or less horny, the 
adult shells being solid and calcareous. Generically, it is allied to Trichotropis and 
Velutina, but the character of the radula is somewhat different, and there are differences 
both in the shell and operculum which are sufficient to separate it. 
EULIMA CONVEXA. 
(Pl. I., figs. 9, 9a.) 
Shell small, elongate, pellucid white, exhibiting the red dried remains of the 
animal, smooth, glossy, rather blunt at the apex; whorls 8, a little convex, slowly 
and regularly increasing, narrowly marginate beneath the slightly oblique suture ; 
aperture ovate, acuminate above ; peristome whitish, the outer margin curved forward 
