MOLLUSCA.—HEDLEY. 
49 
One specimen, December 14th, 1913, from 45-50 fathoms, in Commonwealth Bay. 
This appears to be a broader shell than the related Rissoa subantarctica Thiele, 
from Kerguelen. It is named in honour of Capt. Charles Wilkes, who made a daring 
reconnaissance in these waters in 1840. 
Cerithiopsilla Antarctica Smith. 
Lovenella antarclica Smith, Nat. Antarct. Exped., ii., 1907, Moll., p. 10, pi. ii., fig. 6. 
Cerithiopsilla Antarctica Thiele, Deutsch. Siidpol. Exped., xiii., 1912, pp. 202, 261 ; 
Id., Hedley, Brit. Antarct. Exped., ii., 1911, p. 5 ; Id., Smith, “ Terra Nova ” 
Exped., ii., Moll., 1915, p. 70. 
A single worn specimen, September 3rd, 1912, from 25 fathoms, Commonwealth 
Bay. 
Eumeta strebeli Thiele. 
(Plate VII., fig. 78.) 
Eumeta strebeli Thiele, Deutsch. Siidpol. Exped., xiii., 1912, p. 203, pi. xii., fig. 25. 
One dredged, December 14th, 1913, in 45-50 fathoms, in Commonwealth Bay. 
Our example is more mature than the single specimen taken by the “Gauss” 
Expedition, having 11 whorls in a length of 10mm. The radial sculpture gradually 
vanishes on the latter whorls which have three sharp peripheral cords and a rather 
flat base. Their glossy surface is engraved with dense microscopic spiral striae. 
Melanella exulata Smith. 
Eulima exulata Smith, “ Terra Nova ” Exped., ii., Moll., 1915, p. 64, pi. i., fig. 2. 
A single immature example having eight whorls in a length of 66mm., dredged 
December 14th, 1913, in 45-50 fathoms; and a still smaller one, December 22nd, 1913, 
from 350-400 fathoms, both in Commonwealth Bay. 
Melanella laseroni sp. nov. 
(Plate VII., fig. 79.) 
Shell small, subcylindrical, slightly curved axially, smooth, glossy, and colourless. 
Apex blunt. Whorls eight, the base of the preceding whorl seen through the transparent 
shell traces a marginal band above the suture. Aperture pyriform, very oblique, outer 
lip thin, curving forward in front of the insertion, rounded below, columella straight. 
Length, 4-75 ; breadth, l-4mm. 
Vol. IV., Part 1 — g 
