142 THE OREGON SNAIL. 



A shell has been sparingly found somewhat similar 

 to the last, but whose whorls are ornamented with a 

 spiral keel and numerous cross ribs. It was named 

 circumcarinata, sir-cum-car-i-na'-ta, by Dr. Stearns, 

 who considers it as only a variety of the last species, 

 though it seems to have specific differences. 



Helix {Ariontd) sequoicola, Cooper, se-quoi '-co-la, 

 meaning, "inhabiting the Sequoias, or redwoods." 

 The shell of this species resembles the last figure in 

 size and general form, but it has a more elevated 

 spire. It is of a glossy chestnut color, and is marked 

 by one dark and two light bands. The upper whorls 

 have many microscopic granulations. It is found in 

 the vicinity of the coast, near Santa Cruz. 



Helix (Aglaia) fidelis, Gray, A-gla'-ya fi-de'-lis, 

 Fig. 128. 



This noble species is found 

 in Northern California, Or- 

 egon and Washington, and 

 it extends as far east as the 

 Cascade mountains. The 

 shells vary much in size 

 and color, but the larger 

 Flg - 12S - ones have a diameter of an 



inch and a half. 



Whorls seven, umbilicus partly concealed by the 

 reflected peristome, surface marked by fine lines of 

 growth. The color is always dark beneath, but the 

 spire is sometimes lighter and marked by rich bands 

 of black and yellow or light brown. 



To the south of the region occupied by this spe- 

 cies, along the coast of California to the north of the 

 Golden Gate, lives the variety infumata, Gould, for- 

 merly considered as a distinct species, but now 



