lGl G. Nevill — New or little-known [No 3, 



thickened, smooth and evenly rounded, margins joined with a well developed 

 callosity, the peristome behind is much thickened and forms a similar varex 

 to those already described. 



Long. 13 £, diam. 4| mil. (wanting the apical whorls). 



Kowloon, opposite Hongkong. 



As will be seen from the above, this fine species, for which I am in- 

 debted to Surgeon-Major R. Hungerford, belongs to the typical section of 

 Rissoina, that is there is no canaliculation at base of the aperture. 



The R villica of Gould, as figured by Sowerby, appears to be its near- 

 est ally. R. pyramidalis is also of a somewhat similar type. 



RlSSOLNA SUBLAEVIGATA, n. sp. 



Shell rather stout, smooth, shining, pellucid ; spire relatively rather 

 short, apex very remarkable, mammillate, strongly inclined to the left, as in 

 the family Ryramellidce ; an opaque, rather broad, not incised band, relative- 

 ly unusually remote from the suture, so much so that it is almost exactly 

 central in the penultimate whorl ; six whorls, much more convexly swollen 

 than in the preceding ; aperture unusually straight, that is not everted, 

 peristome thickened, columella callously reflected, considerably more per- 

 pendicular than in Schwartz's fig. 79 R. laevigata, which otherwise, 

 except for the characters of the apex and opaque submarginate band, well 

 represents the species. 



Long. 3^, diam. 1| mil. 



Andamans ; coll. G. Nevill, Esq. 



Under coral blocks, at low- water, Ross Island ; Herr Schwartz con- 

 sidered this form a variety of R. laevigata, C. B. Adams, from Jamaica. 

 The species probably has a wide range, it will very likely prove to be the 

 shell mentioned by Herr Schwartz, page 111, as R. laevigata, from Steward's 

 Island (E. of Solomon Islands). 



RiSSOINA PSEUDOBRTEREA, n. sp. 



? Schwartz, Mon. Rissoina, pi. 5, fig. 36 A., Mauritius, as R. bryerea, var. (not 

 fig. 36, R. bryerea, Mtg., West Indies). 



Turreted, very thick and solid, white ; spire conical, abruptly pointed, 

 suture excavate, apex rather obtuse ; whorls 6, turretly planulate, the last 

 four evenly ribbed longitudinally, the ribs very massive and broad, rather 

 distant, quite perpendicular, terminating some little distance from the base 

 (not the case in R. foyer ea), finely and rather closely decussated with a 

 transverse striation, especially noticeable in the interstices, towards the 

 base where the longitudinal ribs cease, there are three (or four ?) well 

 developed transverse ribs, but slightly (if at all) subnodulose, the last 

 whorl is proportionately long, more so than in the above quoted figure, it 

 has 11 ribs (18 to 22 in R. bryerea, fide Schw.) ; aperture small, subqua- 



