A COAST SPECIES. 



135 



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 [Ariontd) 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 Califorjiiensis. 



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 



tig- 124. 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 



