20 Twenty-Second Annual Report on State Cabinet. 



Physa hypnorum, Linn. Pond near Bald Mountain. Rare. 



PLANORBIS, Lamaeck. 

 Planorbis trivolvis, Sa/y. De Kay, p. 59. Yery common. 



Planorbis bicarinatus, Say. De Kay, p. 60. Common in the 

 Mohawk basin. 



Planoebis campanttlattts, Say. De Kay, p. 61. Common in the 

 Mohawk basin and canals. 



Planorbis exacutus, Say. De Kay, p. 63. In the Hudson River 

 near Albany. Rare. 



Planorbis armigerus, Say. De Kay, p. 62. In swamp, near 

 Bald Mountain, and in the Mohawk basin, near Rensselaer and 

 Saratoga R. R. bridge. Rare. 



Planorbis parvus, Gould. De Kay, p. 63. Not common. Proba- 

 bly young of P. elevatus. Mohawk River, near Cohoes. 



Planorbis deflectus, Say. De Kay, p. 65. Common. Mohawk 

 basin. 



MELANIA, Lamaeck. 



Melania virginica. Grmel. De Kay, p. 90. Mohawk River and 

 basin. Not common. 



Melania elevata, Say. Jour. Acad. Nat. Sci. Phila., Yol. II, p. 

 176. Very common in the canals. 



Melania subularis ? Lea. De Kay, p. 92. Not common. Mohawk 

 River and basin. 



ANCYLUS, Geoffeoy. 

 Ancylus . Clinging to stones near Cohoes Falls. 



SOMATOGYRITS. 

 Somatogyrus integer, Say. Not common. Mohawk basin, near 



railroad bridge. 



AMNICOLA, Gould. 



Amnicola limosa, Say. Jour. Acad. Nat. Sci. Phila., Yol. I, p. 125. 

 In, the Hudson River near Albany, according to Mr. Whitfield. 

 I have not succeeded in finding it in the vicinity of Troy. 



