70 "TERRA NOVA" EXPEDITION. 



I'd. Cerithiopsilla Antarctica (Smith). 



Lovi'neIJa untarcfica, Smith, "Discovery" Gastropoda, p. 10, pi. II, figs. 6, GA (1907); 



Hedley, Brit. Antarct. Exped. 1907-9, Biol., vol. II, Mollusca, p. 5. 

 Ccritlnopyi/lu aittnrcti<-<i : Thiele, Deutsche Siidpolar-Exped., vol. XIII, p. 205, pi. XII, fig. 28. 



Stations 316, 331 : 190-250 fathoms. 



The generic name Lovenella, Sars (1878), being preoccupied for a genus of 

 Hydroids described by Hiucks in 18(19, was changed to Ci'rif/tic/di by Verrill in 1882. 

 According to Thiele the radula of this and two allied species differs from that of 

 ( '< ritliii'llii. 



27. Prosipho elongatus, Thiele. 



ProsipJio elongatus, Thiele, Deutsche Siidpolar-Exped., vol. XIII, p. 210, pi. XIII, fig. 5 (1912). 



Station 338 : 207 fathoms. 



A single specimen, rather larger than the type, measuring 14'5 mm. in length 

 and. 6 in diameter. The periostraeum is yellowish, thickish, and in the dried condition 

 more or less deciduous. The shell is white externally, also within the aperture. 



28. Prosipho ximili*, Thiele, var. 



Prosipho similis, Thiele, Deutsche Siidpolar-Exped., vol. XIII, p. 207, pi. XII, fig. 32 ; 

 pi. XVI, fig. 7, radula (1912). 



Station 194: 180-200 fathoms. 



A single specimen agreeing in form with the figure, but differing in having 

 three spiral threads instead of four on the upper whorls. In this respect it agrees with 

 P. </r<if/lix, Thiele, figured on the same plate (fig. 33), but that species is much more 

 slender, and its aperture much shorter in proportion to the whole length of the shell. 



29. Prosi/iJiti unin/ias, n. sp. PL I, fig. 10. 



Shell shortly fusiform, dirty whitish ; whorls 5|, first one and a half smooth, convex, 

 forming a mammillated apex ; three following whorls with four spiral lirse, the last 

 with thirteen, of which the two or three uppermost, like those on the spire, are finely 

 nodulous through being crossed by longitudinal threads, about twenty in number, on 

 the penultimate whorl ; fine lines of growth cover the entire surface ; aperture pyriform, 

 smooth, and white within, less than half the length of the shell ; columella arcuate 

 above, oblique below ; anterior canal moderately broad, oblique, and slightly recurved. 



Length, 7 '5 mm. ; diameter, 3 '5. Aperture, 3 - 5 mm. in length. 



Station 331 : 250 fathoms. 



Only a single specimen, but quite distinct from the other known forms of the 



genus. 



