78 HELIX. 



H. BERTINIANA, Canefri. PL 14, figs. 25-27. 



Covered perforate, obliquely irregularly rugosely striate, diaph- 

 anous, white, under a thin light corneous epidermis ; whorls 6, 

 .slightly convex, the last descending in front, periphery obtusely 

 marinated, base convex. Diam. 11 mill. 



New Guinea. 

 H. PACIFICA, Pfr. PL 14, fig. 28. 



Perforate, thin, pellucid, striulate, corneous ; whorls 6-62, a little 

 convex, the last acutely carinated, base a little more convex, 

 smooth, shining. Diam. 5'5 mill. 



Cocos IsL, Pacific Ocean. 

 H. SECURIFORMIS, Desh. PL 15, fig. 31. 



Subperforate, thin, shining, smooth, acutely angulated at the 

 periphery, greenish ; whorls 4, a little convex, rapidly enlarging, 

 the last large, tumid, convex below. Diam. 10 mill. 



Hob. unknown. 

 H. GONIOMPHALA, Pfr. PL 15, fig. 34. 



Narrowly umbilicated, solid, obliquely rugulosely striated, fulvous, 

 suture plane, margined ; whorls 6 , flat, slowly enlarging, the last 

 more convex above, not descending in front, periphery subcom- 

 pressed and acutely carinated, base a little plane, angulated around 

 the umbilicus ; base of periphery callously thickened. 



Diam. 20'5 mill. 



Ins. Ponape, Caroline Is. 



H. NIGRITELLA, Pfr, PL 15, figs. 35-37. 



Moderately umbilicated, a little solid, brownish, under a blackish 

 olivaceous epidermis; whorls 5i, nearly flat, slowly enlarging, 

 periphery acutely carinated, base more convex. Diam. 14*5 mill. 



Ins. Ponape, Caroline Is. 

 Var. OPPRESSA, Pease. 



More depressed, light yellowish, with a brown sutural band, base 

 brown, frequently with a marginal yellowish line. Diam. 13 mill. 



H. CONTIGUA, Pease. PL 15, figs. 38, 39. 



Narrowly umbilicated, solid, thick, thinly longitudinally striated, 

 yellowish, sometimes with a wide chestnut band ; whorls 6-7, con- 

 vexly flattened, periphery acutely angulated, suture scarcely im- 

 pressed, the base planulate or subconcave, lip thickened. 



Diam. 9, alt. 10 mill. 



Ins. Ponape, Caroline Is. 



It is H. congrua, Pease, not Pfr. 



