FRESHWATER SHELLS OF UTAH. 
a oo 
Spherium occidentale, Prime. 
; dentatum, Hald. 
Pisidium occidentale, Newc. 
' compressum, Prime. 
ultramontanum, Prime. 
Anodonta Oregonensis; Lea. « 
Limnea stagnalis, Linn.. 
Limnophysa Nuttalliana, Lea. ~ 
Haydeni,. . °c"? 
caperata, Say. 
proxima, Lea. 
elodes, Say. 
palustris, Muli. ’ 
: desiduosa, Say. 
Physa Sayi, Tappan. 
,  heterostrophe, Say. 
Bulinus hypnorum, Linn. 
Planorbis trivolvis,Sa y. 
d lentus, . , 
Gyraulus vermicularis, Gld. 
Valvata sincera, Say. 
Bythinella Binneyi, ? Tryon. 
Amnicola longinqua, Gld 
Fluminicola fusca, Hald. 
Pomatiopsis intermedia, Tryon. 
? 
7 aoe a Soom} 
Leptolimexa Kirtlandiana, Lea. | 
