Shells of Teoy and Vicinity. 19 



^PISIDIUM, Pfeiffer. 

 Pisidium vieg-inicum, JBourg. Abundant in the canals and Hudson. 



Pisidium compeessum, Prime. Mohawk River and canals. 



PALUDINA, Lamarck. 



Paludina integea, Say. De Kay, p. 84. Very common. Reversed 

 specimens found in proportion of 1 to 250. 



Paludina decisa, Say. De Kay, p. 84. Not common. Mohawk 

 basin. 



Paludina bufa, Hold. Mohawk basin. Rare. 



VALVATA, Muuoer. 



Yalvata tbicaeinata, Say. De Kay, p. 118. Very common in 

 all places in the vicinity. 



LIMNJ3A, Lamarck. 

 Limn^ea elodes, Say. Very common. 



Llmn^ea elodes, var. catascopium, Say. De Kay, p. 67. Very 

 common. 



Limn^ea ampla, Mighels. Portland Society Natural History, Vol. I. 

 In the summer of 1866, one dead shell was found in Dry River, 

 West Troy. Mr. H. Rousseau says he has found it in a spring 

 between Troy and Albany, near the H. R. R. R. track. 



Limn^ea humilis, Say. De Kay, p. 71. Mohawk basin. Common. 



Limn.ea beflexa, Say. De Kay, p. 71. Mohawk River and canals. 

 Not common. 



Llmn^ea desidiosa, Say. De "Kay, p. 73. Mohawk basin. Rare. 



Limn^a umbilicata, Adams. In the Mohawk River, and Hudson 

 River, at Albany. De Kay, p. 69, describes this shell under the 

 name of L. caper ata, a different shell. 



PHYSA, Draparnauld. 



Physa heteeosteopha, Say. De Kay, p. 76. In brooks, and fine 

 specimens in the Hudson River, near Albany. 



Physa ancillaeia, Say. De Kay, p. 79. Common in the Hudson 

 River and Mohawk basin. 



