22 [Senate 



millpond formed by a small stream which puts into the Ottawa a 

 few rods below. The pond is strewed with Paludina vivipara, a few 

 Cycladesj and occasionally a Planorhis and Physa. Land shells are 

 rare : I saw but one during the season. 



Limestone filled with fossils of the Trenton group is found about 

 three miles from L'Orignal, at a place called the Bay. It receives 

 a finis polish, but the minute quartz crystals which are disseminated 

 through the stone renders it difficult to work. 



The Rev. Mr. Bell has collected fine specimens of Fossil Fish 

 about nine miles from By town, upon a stream that flows into the 

 Ottawa below that place. He has also found the Saxicava and other 

 fossil shells on the shore opposite L'Orignal, in a bank of clay -, but 

 I was unsuccessful in my search for them. 



In three rambles on the shore of the Ottawa, I found six genera 

 and twenty or twenty-two species of tlie Unio, Anodon^ Masmodouj 

 Cyclas, Paludina and Physa. I found Lymnceas twenty miles below, 

 at St. Andrew. Yours, Ann M. Redfield. 



CRUSTACEA. 



ORDER PCECILOPODA. 



Polyphemus occidentalis, Horsefoot or King-crab. 



Dekay's New- York Fauna, p. 55. From the eastern shore of Long Island. 



