172 BULLETIN OF THE 
In examining the genitalia I find the base of the duct of the genital bladder 
greatly 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 Cooperi’ 
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 zone that fades out as it passes toward the apex. 
The peristome is simple, thickened, its terminations joined by a callus; aperture 
obliquely subangulate; the suture is well impressed. Height of the largest speci- 
men 1 inch, breadth 14 inches; height of the smallest specimen 4 inch, breadth 
1 inch. 
Rathdrum, Idaho. 
An authentic specimen is figured in the Third Supplement. 
Patula strigosa, Gour», 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 specimens the light color prevails, in others the horn-color spreads over 
the shell in irregular patches. Height } inch, breadth 1} inches. 
Rathdrum, Idaho. (Hemphill.) 
Patula strigosa, var. bicolor, Hrmruıtr, The Nautilus, 1890, p. 183. 
An authentic specimen is figured. 
Patula strigosa, Goutp, var. lactea, HEMPHILL. 
Plate IV. Fig. 8. 
This is a beautiful clear milk-white shell, with 53 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 14 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 strigosa group. This colony inhabits open places in the dense pine forests 
of the mountains, overgrown with deciduous bushes. They hibernate among 
