132 DAVENPORT ACADEMY OF NATURAL SCIENCES. 



Vertigo Californica, Rowell. 

 Locality : Summit Canon, Mt. Xebo, Utah. 



Succinea lineata, W. G. Binney. 



Locality : Empire, Col. 



Both this and the preceding species are common throughout the West 

 in suitable localities. 



Succinea Nuttalliana, Lea. 

 Locality : Utah Lake, Utah. [On rushes close to the water.] 

 The common species of the Central Province. 



Pulmonata Limnophila. 



L,I5IN.EID^E. 



Limnea stagnalis, Linnaeus. 



Localities : Utah Lake and Spring Lake, Utah. 



[Very large and abundant among the rushes growing in shallow, brack- 

 ish water at the southern extremity of Utah Lake. A favorite article 

 of food with the ducks, which were very plentiful in the same locality.] 



Limnea palustris, Muller. 

 Locality : Utah Lake, Utah. 

 [Plentiful, but never found in company with the above.] 



Limnea elodes, Say. Variety ? 

 Locality : Fort Bridger, Wyoming Territory. 

 [In small pools.] 



Limnea desidiosa, Say. 



Locality : Utah Lake, Utah. 



[In the waters of a fresh water spring near the southeast shore, with 

 L. i)alustris.] 



Limnea catascopium, Say. 

 Locality : Utah Lake, Utali. 

 [Semi-fossil, on a salty mud Hat.] 



Limnea bulimoides, Lea. Variety? 

 Locality : Denver, Col. 

 [In small pools.) 



Carinifex Ne'wberryi, Lea. 

 Locality : Utah Lake, Utah. 

 Semi-fossil on a mud flat. 



Physa elliptica, Lea. 



Locality : Empire, Col. 



Physa (jyrina., Say, of which, by some authors, this is considered only 

 a variety, has been found at various points in the Tenitories ; but I do 

 not think this particular form has been reported heretofore from any 

 locality west of the Mississippi. 



Physa Sayii, Tappan. 

 Localities : Fort Bridger, Wyoming Territory : Utah Lake, Utah. 



