THE NAUTILUS. 93 



Quadrula pustulosa var. Chikaskia River, Drury, Kansas. 



A peculiar shell is associated with pustulosa at this locality. It is 

 compressed, quite elongated, and the surface is ornamented with 

 many olive-green rays, radiating from the umbones. It is smooth, 

 like schoolcraftensis, but is much more elongated than that variety, 

 to which the Oklahoma pustulosa might quite appropriately be re- 

 ferred. No specimens of the typical pustulosa have been seen from 

 the region in question. Additional material may show this to be a 

 recognizable race of pustulosa. 



Quadrula ruhiginosa (Lea). Chikaskia River, Drury, Kansas. 



Quadrula coccinea (Conrad). Chikaskia River, Drury, Kansas; 

 Chikaskia River, Tonkavva, Oklahoma. 



Sphcerium simile Say, variety. Tonkawa, Oklahoma; Wild Horse 

 Creek, Spivey, Kansas. 



A much elongated and very cylindrical shell, which may prove to 

 be a race of simile. 



Sphcerium striatinum Lamarck. Sand Creek, Argonia, Kansas. 



Musculium transversum (Say). Shoofly Creek, "Williston, Okla- 

 homa. 



Musculium elevatum (Haldeman). Tonkawa, Oklahoma; Meridian 

 Creek, South Haven, Kansas. 



Not quite typical, the shell being more elongate ovate in outline 

 than in typical elevatum. 



GASTROPODA. 



Physa crandalli Baker. "Wild Horse Creek, Spivey, Kansas; 

 Sand Creek, Argonia, Kansas; Meridian Creek, South Haven, Kan- 

 sas; Spring Creek, Anthony, 'Kansas; Shoofly Creek, Williston, 

 Oklahoma; Spring Creek, Grant Co., Oklahoma. 



Physa ancillaria Say. Spring Creek, Grant Co., Oklahoma; 

 Wild Horse Creek, Spivey, Kansas; Tonkawa, Oklahoma; Shoofly 

 Creek, Williston, Oklahoma. 



The specimens are exactly comparable with typical ancillaria from 

 Philadelphia. 



Physa anatina Lea. Tonkawa, Oklahoma. 



Ancylus rividaris Say. Slioofly Creek, AVilliston, Oklahoma. 



Planorbis trivolvis Say. Wild Horse Creek, Spivey, Kansas; 

 Spring Creek, Grant Co., Oklahoma. 



Planorbis deflectus Say. Spring Creek, Anthony, Kansas. 



