78 HELIX-PAPUINA. 



H. ZELIXA 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, 



O " 



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 



, 1 +j 



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

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

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

 suture and coloration. (Cr.) 



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, 



