MOLLUSCA, I. SMITH. 95 



This species, of which two specimens were dredged, is closely allied lo / >. bilirata, 

 Smith.* lint lias nlxmt twelve finer cost;u. and the protoeonch is larger. Tin- spiral 

 thread-like lines also are much more distinct. 



:!. />ri//iii rinriixix. n. sp. 1M. II. tig. 1:2. 



Shell fusiform, pale In-own, with whitish cost:u : whorls !). two apical smooth, 

 convex, forming a maminillar apex, the rest concave above the convex, oblique 

 cost a.- (ten on the penultimate whorl) with transverse tubercles on the middle 

 caused liy spiral liraj passing over them ; the tubercles are more pronounced upon 

 some of the upper volutions than upon the last two or three; in the upper concavity 

 the threads are fiuer than those below; last whorl attenuated in front, finely lirate 

 throughout ; aperture white within ; labrum with a strong external varix a little way 

 from the thin brown finely denticulate edge; posterior sinus moderately deep, rounded : 

 columella smooth, with a thin callus united above to the end of the outer lip; anterior 

 canal slightly recurved. 



Length, 22'5 mm. ; diameter, 7. Aperture 10 mm. long, width in the middle '2 p . r >. 



Station 4:2, off Uio de Janeiro : 40 fathoms. 



Two of the spiral lira? around the middle of the whorls are more conspicuous than 

 the rest, and much more distinctly nodulous. The fine growth-lines are sinuose, and 

 most evident at the upper part of the whorls. 



4. Marginella fraterculus, n. sp. PL II, fig. l:>. 



Shell subcylindrical, pale straw-colour, smooth, shining ; spire very short, pale 

 reddish at the rounded tip; whorls 4-5, the last with gently curved outlines: suture 

 marked with a thin white Hue ; aperture almost as long as the shell : labrum thickened 

 externally, white, a little incurved; columella with four white plaits; in one specimen 

 there are five, the fifth being less pronounced than the rest, and situated above them. 



Length. 30 mm. ; diameter, 15. 



Station 4:2. off Uio de Janeiro : 40 fathoms. 



I am somewhat in doubt whether this may not be a dwarf variety of .!/. cuf/i r/. 

 Jousseaume.f from which it differs in its rather narrower form and more distinct and 

 elevated spire. One of the four specimens from Station 4:2 is of an opalescent brown 

 colon]-, rather similar to that of .17. /ntl/itfn. Born. 



5. Marginella janeiroensis, n. sp. 1M. II. tig. 14. 



Shell small, fusiformlv ovate, white, smooth, shining ; whorls four, apex obtuse; 

 last and penultimate whorls sloping above, then faintly angled: aperture narrow, 



* Ann. Ma-. Nat. Hist., 1888, vol. II. p. :5<>r,. 



f Revue ct Mai;, elr X(.l. 1*7.",. vol. XXVI, J>. -."!. 



W -' 



