OP CONCHOLOOY. 34t 



27. H. DEViA, Gould. 

 n. Baskervillii, Pfr. 



Banks of the Columbia, Western Oregon, (Abernethy.) 

 Vancouver's Island, (Pfeiff'er.) 



This, with the following three species, are often dentated, 

 the last two always. I have a specimen of the devia, which 

 deviates from the rule, as it is a full-grown adult shell without 

 a tooth. The animal is a light amber-color with fine granu- 

 lations, base of foot dirty white, mantle light ash- color, pulsa- 

 tions of the heart, as seen through the shell, 37 in a minute, 



28. H. Columbiana, Lea. 



]^ this species it is customary to include H. lahiata, Gould. 

 Its range, as far as traced, is from Fort Simpson, north, lat. 54° 

 40', through British Columbia, Washington Territory, Oregon, 

 and south to Santa Cruz, in California, in 87° 20'. With one 

 exception, this has the widest range of any of our Helices of 

 the West Coast, ranging through over 17° of latitude. 



The varieties are numerous, and may be classified to suit 

 the views of naturalists. The following I have found conve- 

 nient: — 



1st. Smooth, 'polished. 



a. umbilicate major, minor. 



b. umbilicus closed " " 



c. dentate " 



2d. hirsute. 



a. umbilicate " " 



h. umbilicus closed " " 

 c. dentate " " 



This will give us at a glance 12 varieties, varying in some 

 detail of character; and if we wish to refine upon the matter, 

 we may add another section of Labiata, which will add six 

 more to our list. 



I have not been able to detect the eyes "at the base of the 

 tentacles," but have always found them as in others of the 

 genus. 



29. H. LORICATA, Gould. 



Sacramento River, (Gould.) Oakland, (Newcomb.) Kla- 

 math Co., (Voy.) 



The characters in the different localities hold good, although 

 the difference in size is well-marked, those from the last named 

 locality more than doubling the size of those found in the 

 vicinity of San Francisco. 



