172 BULLETIN OF THE 



In examining the genitalia I find the base of the duct of the genital bladder 

 greatl}' swollen along a fifth of the total length of the duct, 



Mr. Hemphill (The Nautilus, 1890, p. 133) thus describes it : — 



The shell in general form resembles a large, coarse elevated or depressed Cooperv 

 It has six whorls, well rounded above and beneath, and subcarinated at the periph- 

 ery. The body whorl has two revolving dark bands, one above and the other 

 below the periphery ; sometimes the upper band spreads over the shell to the su- 

 ture, forming a dark chestnut zoue that fades out as it passes toward the apex. 

 The peristome is simple, thickened, its terminations joined by a callus ; aperture 

 obhquely subangulate; the suture is well impressed. Height of the largest speci- 

 men 1 inch, breadth 1^ inches ; height of the smallest specimen | inch, breadth 

 1 inch. 



Eathdrum, Idaho. 



An authentic specimen is figured in the Third Supplement. 



Patula Strigosa, Gould, var, bicolor, Hemphill. 

 Plate IV. Fig. 7. 



This shell is a colored variety of the last. It may be characterized as being of 

 a general dark horn-color mingled with dirty white; there are occasional zones of 

 dark horn-color above and fine dark lines beneath, but no defined bands. In some 

 of the specim-ens the light color prevails, in others the horn-color spreads over 

 the shell in irregular patches. Height | inch, breadth IJ inches. 



Rathdrum, Idaho. (Hemphill.) 



Patula strigosa, var. bico/or, Hemphill, The Nautilus, 1890, p. 133. 

 An authentic specimen is figured, 



Patula strigosa, Gould, var. lactea, Hemphill. 

 Plate IV, Fig. 8. 



This is a beautiful clear millc wbi*e shell, with 5^ whorls, subcarinated at the 

 periphery. In the elevated forms the aperture is nearly circular, as broad as high ; 

 but in the depressed forms the aperture is broader than high, obliquely suban- 

 gulate. The lip is simple, thickened, its terminations joined by a heavy callus, — 

 the thickening of the lip and callus is a shade darker than the body of the shell. 

 Height of the largest specimen 1 inch, breadth IJ inches. 



Rathdrum, Idaho. 



The above varieties represent a colony of the largest specimens of the strigosa 

 group that I have collected. They are an important and very interesting addition 

 to the series, and serve to confirm my previous views on the relationship of what I 

 call the sti-igosa group. This colony inhabits open places in the dense pine forests 

 of the mountains, overgrown with deciduous bushes. They hibernate among 



