HELIX. 



This species presents the following differences from If. temperata; 

 the shell is smaller, more globose, whorls higher, striation more 

 marked, the sculpture is clearer, and accompanied with granules, 

 etc., etc. It is larger than H. saulcyi, more regularly sculptured, 

 whorls less rapidly increasing, and aperture rounder. 



H. EMBRITHA Mabille, 1882. Unfigured. 



Imperforate, conic-depressed, thick, subopaque, without cuticle or 

 color, rudely crispato-malleate, spire convex, prominent, apex smooth, 

 shining, obtuse ; whorls 5-6, first convex-sloping, the last compressed 

 rounded, regularly rapidly increasing, sepaftited by impressed 

 sutures; body-whorl large, angular in front of the aperture, becom- 

 ing round, deflexed anteriorly, constricted at the aperture, swollen 

 below ; aperture oblique, lunate, oblong, margins sub-distant, sub- 

 parallel, joined by a callus ; peristome thickened within, widely 

 reflexed, shining, subrevolute ; columellar margin adnate, strongly 

 thickened, appresed over umbilicus, nearly straight, armed with an 

 obtuse lamina. Diam. 27, alt. 16 mill. 



Quaternary of Puerto-da-Luz, Ins. Grand Canary. 



Most nearly allied to H. saulcyi, but may be distinguished by the 

 thicker shell, larger size, irregular malleation and the entire absence 

 of granulations ; from H. temperata the more depressed form and 

 more prominent spire separate it. 



H.-CRYPSIDOMA Mabille, 1882. PI. 47, fig. 71 . 



Imperforate, subdepressed, orbiculate, solid, thick, opaque, covered 

 with sharp nialleations ; spire slightly convex, apex obtuse, shining, 

 rugulose ; Avhorls 5-5*,' slightly convex, inner regularly, the outer 

 very rapidly increasing, separated by impressed sutures ; body-\vhorl 

 large, angular at its origin, becoming turgid-rounded, subconstricted 

 and briefly deflected at the aperture, slightly tumid below ; aperture 

 lunate, oblique ovate-oblong, margins acute, the columella adnate, 

 appressed, provided with a dentiform lamina. 



Diam. 27, alt. 16 mill. 



Quaternary of Puerto-da-Luz, Grand Canary. 



More depressed, thicker, with less prominent spire than H. saul- 

 cyi, and peristome more developed. 



H. STULTA Mabille, 1883. PI. 47, fig. 69. 



Imperforate, subglobose-depressed, thick, solid, opaque, destitute 

 of color and cuticle, coarsely reticulato-malleate ; spire conic, apex 

 obtuse, smooth ; whorls 5-5 2, first convex, regularly, the last rapidly 



