MUSEUM OF COMPARATIVE ZOOLOGY. 



199 



Polygyra Febigeri, Bland. 

 pustula, Ferussac. 

 pustuloides, Bland. 



Triodopsis Hopetonensis, Shuttleworth. 

 Levettei, Bland. 



See 2d Suppl. This species may perhaps be considered one of the Central 

 Province. A variety, however, approaches very nearly the Indian Territory 

 shell lately described as Mesodon Kiowaensis. This variety is toothless. It is 

 smooth, like Levettei, and has six whorls. 



Triodopsis vultuosa, Gould. 

 Copei, Wetherby. 



See 2d Suppl. To the synonymy add Triodopsis Cragini, 

 Call, Bull. Washburne Coll. Library, I., No. 7, p. 202, Fig. 5, 

 Dec, 1888, Topeka, Kansas. I have seen an authentic speci- 

 men, given by Mr. Call to the National Museum. It is figured 



here. 



Mesodon Romeri, Pfeiffer. 



divestus, Gould. 



The tvpical form has few separated, very stout ribs ; a va- Triodopsis Cragini, 

 riety from Eufala, Indian Territorj 7 -, sent me by Mr. C. T. 

 Simpson, has numerous fine ribs and revolving microscopic lines. One in- 

 dividual is 24 mm. in greater diameter. 



Mesodon jejunus, Say. 



See Manual of American Land Shells, p. 390. 



Mesodon Kiowaensis, Simpson. 



Shell umbilicated, orbicularly depressed, solid, dark brown in color ; whorls 

 5, with rather coarse strise, and fine revolving impressed lines, 

 which are much more conspicuous on the last whorl. Suture 

 deeply impressed, leaving the whorls well rounded ; aperture 

 oblique, somewhat transversely rounded, forming fully three 

 fourths of a circle ; peristome thick and solid , whitish or pur- 

 plish, evenly reflected, with a slight constriction behind it ; 

 umbilicus moderate, deep, exhibiting but little more than one 

 of the whorls. Greater diam. 15, lesser 13, height 7 mm. 



Kiowa Station, about thirty specimens, mostly dead. Lime- 

 stone Gap, two dead specimens. Another badly bleached shell 

 was obtained jiot far from Eufaula (Indian Territory). 



Jaw with 9 ribs; teeth with fewer laterals than Sayii, and the inner cusp is 

 bifid on the marginals, while in Sayii it is entire (Simpson). 



Mesodon 

 Kiowaensis. 



