34 BULLETIN OF THE 



and Colorado. The original specimen figured in Vol. V. being immature I 

 here give (PI. II. Fig. 15) one of a mature individual. Above (p. 31), are 

 noticed specimens from Logan, Utah, showing the gradual change from strigosa 

 to Hemphilli. 



The variety Hemphilli is characterized by minute revolving strite, and is 

 decidedly carinated. 



Var. Oquirrhensis, HEMPHILL. 

 Plate II. Fig. 12. 



Oquirrh Mountains, Utah (H. Hemphill). (See p. 30.) 



This form has quite prominent, revolving ribs, more developed than in the 

 typical Haijdeni. The aperture is oblique, the ends of the peristome approached 

 and joined by a heavy callus. There is a strongly developed carina. Albino 

 individuals were found. 



H. Bruneri, Ancey, is a synonym of Oquirrhensis. 



Var. Gabbiana, HEMPHILL. 

 Plate II. Fig. 9. 



Near Salt Lake City (H. Hemphill). (See p. 30.) 



As described by Mr. Hemphill above, this variety is a coarse, rough Haydeni, 

 with the revolving ribs nearly or quite obsolete. Like all the other varieties, 

 it varies in size and shape. The ends of the peristome are nearly approached, 

 and often continuous. 



Var. Haydeni, GABB. 



Utah (H. Hemphill). (See p. 30.) 



This well-known form has the revolving ribs most developed of all. For 

 figure see Terr. Moll., V. p. 159. 



Var. Wasatchensis, HEMPHILL. 

 Plate II. Fig. 7. 



Wasatch Mountains, Utah (H. Hemphill). (See p. 29.) 

 This is the most peculiar variety, with coarse revolving striae and ribs (some- 

 times wanting), rough transverse wrinkles, decided carina crenellating the su- 

 tures, ends of peristome approached : the umbilicus is very narrow : the shell 

 is elevated, often pyramidal : apex acute. Albino individuals were also found. 

 With its peculiar pyramidal spire and small umbilicus it combines the sculp- 

 turing peculiar to several of the other varieties. (See p. 29.) 



