MARINE MOLLUSCA OF THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 357 
Family Cancellarude. 
Paradmete typica, Strebel. 
Paradmete typica, H. Strebel, Schwed. Sudpolar Exped., Band vi., 1, p. 22, Taf. iii. fig. 35 a—f (1908). 
Hab.—Burdwood Bank, Station 346, at 56 fathoms, December 1, 1903. 
Thus showing a considerable extension in range. Only one specimen, but in 
good condition. 
Admete limnexformis, Sm. 
% Admete limnexformis, E. A. Smith, Phil. Trans. Roy. Soc. Lond., clxviii. p. 172, pl. ix. 
fig. 4 (1879). 
Hab.—Trawl, Burdwood Bank, at 56 fathoms. Station 346. 
One example, in good condition, exactly agreeing with the type, from Kerguelen 
Land. We should hardly be prepared to suggest placing this in Dr STREBEL’s new 
genus Paradmete. Mr Cuaries Hepiey has lately hinted at its possible reception 
into the genus Odostomiopsis, Thiele, and this is well worthy of consideration. The 
shell is small, white, semi-transparent, and, as the trivial name, so well chosen, 
suggests, almost an exact reproduction of Lomnexa peregra, Miill., in miniature. 
Order OPISTHOBRANCHIATA. 
Sub-order TECTIBRANCHIATA. 
(a) Bulloidea. 
Family Tornatinde. 
Retusa antarctica, sp. n. (Plate, fig. 20). 
R. testa delicata, parva, ovato-fusiformi, rimata, pallidissimé livido-virescente, perlevi, subpellucida, 
anfractibus 4, quorum apicales duo tumescentes, ceteris ad suturas rotundé gradatim impressis, ultimo 
magno, levi, apertura ovata, labro sinuato, vix crassiusculo, columella obliqua. 
Alt. 3:25, diam. 1:75 mm, 
Hab.—Scotia Bay, South Orkneys, 9-10 fathoms. Station 325. 
A small, plain, greenish-livid species, translucent, very smooth, with swollen nuclear 
whorls, and roundly shouldered at the sutures. 
Retusa truncatula (Brug.). 
This widely distributed species, the full synonymy of which we gave in our last 
paper (loc. cit., p. 141), and which is hardly distinguishable from the British form, 
also occurred at the Burdwood Bank locality, Station 346, 56 fathoms. 
Fragments of others of this order, belonging to the genera Cylichna and Phaline, were 
TRANS. ROY. SOC. EDIN., VOL. XLVIII. PART II. (NO. 18). 54 
