LIMN^A. Ill 



be new, merely represent forms occurring in 

 all the western species. It has been suggested 

 that this species may not be distinct from 

 catascopium, but there is, I think, no doubt of 

 its distinctness ; the shell is larger, more in- 

 flated, lighter colored, emarginate, and is de- 

 cidedly a north-western species, while catasco- 

 pium certainly originated in the Atlantic 

 Middle States, although extending westward 

 to Michigan. 



31. LIMNiEA BULIMOIDES, Lea. 



Hald. Monog. 44, t. 13, figs. 9, 10. 



Inhabits Oregon and California, and perhaps 

 Nebraska. 



32. LIMNiEA SOLID A, Lea. 



Hald. Monog. 36, t. 11, figs. 10—13. 



Mr. Binney s figure 86 represents this spe- 

 cies. 



(85) 



