A COAST SPECIES. 



1 35 



is more depressed and less globular than Fig. 123, 

 and the umbilicus is small. The color is from light 

 to dark brown, and a dark band runs around the 

 whorls, but the rim of the lip is white. I have seen 

 living specimens from a garden in the City of Ala- 

 meda, and from the hills back of Oakland. The 

 diameter is less than an inch. The epidermis of the 

 young ones is studded with little bristles. 



Helix (Arionta) Diabloensis, J. G. Cooper, Di-ab- 

 lo-en'-sis, has a flattened shell consisting of six 

 whorls. Its surface is thickly marked with little 

 depressions, like the dents caused by the blows of a 

 small hammer. The aperture is oblique, the umbili- 

 cus distinct, and the peristome or rim around the 

 aperture is white and reflexed. The shell is horn- 

 colored, with a darker band. Its diameter is less 

 than an inch. It is a species of the Coast range of 

 central California, being named from its occurrence 

 near Mt. Diablo. By some it is considered as but 

 another variety of Californieiisis. 



Helix {Arionta) arrosa, Gould, ar-ro'sa, Fig. 124, is 

 a noble species living along the California coast, from 



Santa Cruz to Mendocino. 



The shell frequently grows 



quite large, an inch and a half 



in diameter, and is moderately 



conical in form. The seven 



whorls, which are from light 



to dark brown in color, are 



Fi s- 12 4- banded with still darker 



brown. The umbilicus is distinct, and partly covered 



by the reflexed peristome. 



I once found fine specimens of this species enjoy- 

 ing their summer sleep under the fallen leaves of 



