HELIX. 



177 



Fig. 310. 



Helix Steai'lissana, Gabb. — Shell narrowly umbilicated, sub- 

 globose, solid, of a dirty white color, irregularly mottled with crowded 

 ashy blotches, grouped into revolving series 

 below, with a decided wide, brownish revolving 

 band above ; with delicate oblique incremental 

 striae, unequally cut by revolving lines ; spire 

 elevated; whirls five, rather convex; aperture 

 oblique, semicircular; peristome simple, acute, 

 its columellar termination white, expanded, re- 

 flected over the half concealed umbilicus. Greater 

 diam. 22, lesser 17 ; height 12 mill. 



Helix stearnsiana, Gabb, Am. Journ. Conch. Ill, 

 235, pi. xvi, f. 1 (1SG7). 



I;0\ver California, from Sta. Tomas to 

 Rosario, under stumps of Maguey. (Gabb.) 



The shell figured and described was re- 

 ceived from Dr. Newcomb. It may not be ^^^.^^ steamstana 

 entirely mature. 



Subgenus EUPARYPHA, Hartm. 



Shell perforate, depressed-globose, corneo-ealcareous, banded ; 

 whirls 5, the upper ones flattened, carinate, the last inflated; 

 aperture dilate-lunar, often labiate within, its columellar margin 

 reflexed. 



Helix areolata, Sowerby. — Shell perforated, orbicularly conoid, 

 striateil, shining, white, variously ornamented with revolving interrupted 

 reddish lines ; spire depressed-conoid ; whirls five, rather convex, the last 

 scarcely descending, somewhat convex at base ; aperture roundly lunar, 



Fig. 311. 



Helix areolata and variety. 



smoky within ; peristome acute, somewhat thickened within, its coln- 

 inellar portion shortly arched, dilated, reflected, with one tooth-like 

 12 November, 1868. 



