184 BULLETIN OF THE 



still plainly visible on the same individual, which I have preserved in alcohol 

 and added to the Biiiney Collection of American Land Shells in the National 

 Museum at Washington. 



Jaw low, wide, arcuate, ends attenuated, anterior surface with 16 ribs, den- 

 ticulating either margin. 



Lingual membrane as in foliolatus ; teeth 50-1-50, with 19 laterals on each 

 side. 



. Genitalia (3d Suppl., Plate X. Fig. H) ; the form from Gray's Harbor has 

 its generative system very much the same as described for foliolatus above. The 

 ovary is much shorter and tipped with brown, and is less tongue-shaped. The 

 penis sac tapers to its upper end. The vagina is not squarely truncated above. 

 The system much more nearly resembles that of Frophysaon Andersoni (see 

 Terr. Moll., V.) than that of the Oljuipia. foliolatus. 



Binneya notabilis, J. G. Cooper. 



Plate I. Fig. 9. 



A new figure is here given, drawn by Mr. Cockerell. 



Triodopsis MuUani, Bland, var. Blandi, Hemphill. 

 Plate II. Fig. 6. 



Shell with the umbilicus partially closed, orbicularl)* depressed ; dark horn-color, 

 obliquely striated ; spire short, very slightly elevated, nearly planiform ; aperture 

 semilunar, at a right angle with axis of the shell, with a very short nipple-like pari- 

 etal tooth ; peristome thickened, white, plain, without teeth and roundly reflected. 

 Height i inch, breadth ^ inch. 



Post Falls, and banks of Salmon River, Idaho. 



Helix Midlani in form and size resembles very much the common tridentata of 

 the Eastern States. Among the various forms it assumes, none are more marked 

 than the little depressed shell before me. It can be very readily separated from 

 the typical Helix Mullani, or its other varieties, by its very depressed form, small 

 size, and the absence of the teeth-like processes on the inner margin of the 

 peristome. 



I cannot detect any microscopical revolving lines, or tubercles bearing hairs, 

 mentioned by Bland in his description of H. Mullani. 



The above desciption is by Mr. Hemphill, who furnished me with the 

 specimen figured. 



Polygyra septemvolva, var. Ploridana, Hemphill. 



Shell deeply umbilicated, elevated, globose conic, light horn-color, with numerous 

 fine ribs above, but smooth beneath ; whorls 5J or 6, the last subangular at the 

 periphery ; suture well impressed ; spire greatly elevated with an obtuse apex : 



