LIMNZA. 111 
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. LIMNZA BULIMOIDES, Lea. 
Hald. Monog. 44, t. 13, figs. 9, 10. 
Inhabits Oregon and California, and perhaps 
Nebraska. 
32. LIMN AA SOLIDA, Lea. 
Hald. Monog. 36, t. 11, figs. 10—13. 
Mr. Binney’s figure 86 represents this spe- 
cles. 
(85) 
