MOLLUSCA, I. SMITH. 71 



;!(). l'r(>.-<ii>li<, tali, i-i-ii/nfiix, n. sp. 1']. i, tig. I I. 



Shell dVfitcly tusifunii. \vliitish ; whorls -(.], the lirst one and a half large, convex, 



smooth, forming a mammillatecl apex. the two following convex. with three 

 spiral lira-, the last with live similar lira', with well-marked (about eighteen) acute 

 tubercles upon them, and also upon those of the spire : about eight liner smooth 

 lin\3 encircle the lower part of the last whorl ; longitudinal plica-. corresponding to 

 the tubercles, not strongly de\dopeil in the interstices; lines of increment very line, 

 closely packed; aperture pyriform. half the length of the shell; columella gentlv 

 arcuate above, a little oblique below: canal rather broad, recurved. 



Length, 5 mm. ; diameter. 275. 



Station 316: 190-250 fathoms. 



Allied to P. i-aiHrllnfi/x, but separable on account of having three instead of two 

 lirse on the spire, and, like those on the bodv-whorl. they arc coarser also and 

 closer together. 



31. Proxl/ilio cancellatus, \\. sp. PI. [. tig. 13 ; PI. II, h'g. 15. 



Shell ovately fusiform, dirty white, consisting of 4. J , whorls ; the one and a half 

 apical smooth, forming a rounded nucleus, the two following convex, with two spiral 

 lirse around the middle, and the last with about twelve lira-, eight of which on the 

 anterior part of the shell are finer than the four above, which, like those on the 

 spire, are acutely nodulous through being crossed by tine longitudinal threads, about 

 eighteen on the penultimate whorl ; extremely tine striae of growth are observable 

 between these threads; aperture almost half the length of the shell; anterior canal 

 moderately broad, a little recurved; columella rather straight, not quite perpendicular. 

 smooth, covered with a thin white callus. 



Length, 5 mm. ; diameter, 3. 



Station, 340 : 1GO fathoms. Also Station 42. off Rio de Janeiro, 40 fathoms. 



This species, of which only a single specimen is at hand from Station :',4(). 

 must be closely related to P. IHII/HXK* of Thiele, but the spiral lira' appear to be 

 finer, the tubercles more acute, and more numerous. The longitudinal threads are 

 more delicate, and are continued farther over the bodv-whorl, thus producing a 

 cancellated appearance. The specimen from Station 42 is figured on Plate II.. fig. 15. 

 It agrees in every respect with that from Station :'.4<). and consequently it seems 

 probable that some mistake in connection with the localities has occurred. It is not 

 likely that this species lives in such rcmotelv distant regions. 



32. Prosipho i-mn/i /i/tii*. n. sp. PI. I, )!'_:'. 12. 



Shell slmrtlv fusiform, whitish; whorls 5. lirst two smooth, convex, forming a 

 dome-like apex, two following convex, with four spiral lira', of which the uppermost 

 is finer than the rest: last whorl with live principal lira-, and about thirteen muc-h 



N 2 



