350 DR JAMES COSMO MELVILL AND MR ROBERT STANDEN ON THE 
tions, such as FR. transenna,* Wats., from Prince Edward Island, and &. aédonist of the 
same author, from Nightingale Island. . gelida, E. A. Sm.,{ is, perhaps, the nearest 
ally ; this is also an Antarctic species, and differs in the possession of an extra whorl, 
and being longer proportionately to its breadth, also in a lesser degree of ventricosity 
of whorl. Only two or three examples. 
Rissoa (Onoba) fuegoensis (Strebel). 
Rissoa (? Cingula) fuegoensis, H, Strebel, Schwed. Sudpolar Hauped., p. 56, Taf. vi. fig. 90 
a, b (1908). 
Hab.—Burdwood Bank, Station 346, 56 fathoms. 
A straw-coloured, closely spirally lirate Rzssoa, which we should Bonsides as 
appertaining to the section Onoba in preference to Cingula. 
Rissoa (Onoba) paucilirata, sp. nu. (Plate, fig. 10). 
R. testa ovata, angusté rimata, alba, epidermide tenuiter evanida straminea, interdum iridescente, 
contecta, anfractibus ad 5, ventricosulis, apud suturas multum impressis, quorum duo apicales nitidi, albi, 
leves, ceteris duobus fortiter spiraliter pauciliratis, liris penultimi dudbus, ultimi anfractis septem vel 
octo, praditis, apertura ovato-rotunda, peristomate tenui, margine columellari feré recto. 
Alt. 2:25, diam. 1:25 mm. 
Hab.—Burdwood Bank, Station 346, 56 fathoms. 
Conspicuous for its strong, spiral, carinated lire, which are fewer in number than 
those possessed by its allies; these spiral ridges seem much the same in the Aleutian 
species 2. Aurwillw, Dall, § or R. brachia, Watson, || from Culebra Island, West Indies. 
This last, indeed, seems a very near ally, though quite distinct. : 
ftassoa (Onoba) sulcata (Strebel). 
Rissoa (Cingula) sulcata, H. Strebel, Schwed. Sudpolar Eauped., p. 56, Taf. vi. fig. 86 a, 6, c (1908). 
Hab.—With the last species named, at 56 fathoms. Station 346. One specimen. 
The spiral sulci are interesting. In form it resembles R. paucilirata, but the 
essential characters are quite diverse. Colour inclined to reddish-fuscous. 
Rissoa (Ceratia) turqueti, EK. Lamy. 
Rissoa (Ceratia) turqueti, EK. Lamy, Kapéd. Antarct. Francaise Charcot, p. 6, pl. i. fig. 8 (1906). 
Hab.—With the preceding. One fine specimen in live condition, sub-pellucid, with 
faint relics of thin stramineous epidermis. Station 346. 
* Rep. Challenger Exped., xv. p. 620, pl. xlvi. fig. 10. + Ibid., p. 600, pl. xlv. fig. 5. 
{ Smrru, Nat. Ant. Haped.: N.H., vol. ii. p. 9, pl. ii. fig. 5. § Proc. U.S. Nat. Mus., p. 309, pl. iv. fig. 8 (1886). 
|| Rep. Challenger Exped., xv. p. 599, pl. xlv. fig. 8. 
