78 HELIX-PAPUINA. 



H. ZELINA Cox. PL 15, fig. 90. 



Shell imperforate, pyramidally-conical, transparent, thin, obliquely 

 and very coarsely striated, straw colored ; whorls 7, almost flat, the 

 last having a very sharp produced keel ; suture broadly margined 

 above ; base flat ; aperture trapeziform ; outer margin a little re- 

 flected ; peristome thickened and white, particularly the lower 

 margin, which is a little everted and reflexed, columellar margin, 

 rather contracted and nodose. (Cox.) 



Alt. '60, greater diam. *62, lesser '55 inch. 



Solomon Is. 



H. zelina Cox, P. Z. S. 1873, p. 150, t. 16, f. 6. 



This species is probably more closely allied to H. cineracea H. & 

 J. and H. subtecta Pfr. than to any other. It is a much more 

 conical shell than these, and its sculpture decidedly coarser ; the 

 flattened-out keel of the periphery is also characteristic of this 

 species. ( Cox.) 



H. CYRENA Crosse. PI. 15, figs. 79, 80. 



Shell with an almost closed perforation, subtrochiform, quite thin, 

 rather pellucid, quite shining, very finely and subobliquely striat- 

 ulate; opaque milk-white, with a rather broad translucent zone 

 above. Spire subconic, rather acute, the apex rosy-violet ; suture 

 impressed ; whorls 5, a little convex, the last whorl subobtusely cari- 

 nated, not descending, somewhat exceeding the spire in length ; base 

 convex, subinflated, more shining, whitish ; aperture very oblique, 

 widely lunate-rhombic ; peristome milk-white, margins subparallel, 

 the columellar margin somewhat thickened, short ; basal margin ex- 

 panded ; outer margin a little reflexed, subangulate in the middle. 



Alt. 11, greater diam. 17, lesser 13? mill. (Crosse.) 



Habitat unknown. 



H. cyrene CR., Journ. de Conchyl. 1869, p. 183 ; 1870, p. 102, t. 

 2, f. 2. 



Allied to If. eva but differing in the slight umbilical perforation, 

 obtuse carina, reflected outer border of the peristome, and the colora- 

 tion. H. helicinoides differs in the more acute keel and the different 

 suture and coloration. ( Or.) 



H. EVA Pfeiffer. PI. 15, figs. 84, 85, 76, 77, 78; pi. 16, figs. 1, 2, 



3,4. 



Imperforate, trochiform, solid, opaque ; the spire straightly conic, 

 periphery acutely carinated ; surface shining, obliquely striatulate, 



