254 Canadian Record of Science. 



Ontario, by Professor Macoun, in 1884, at White Fish 

 River, north of Lake Superior, and at Lake Hannah, on 

 the Nepigon River; by Dr. A. C. Lawson, in 1886, at 

 Eainy Lake ; by Mr. W. Spreadborough, in 1894, from 

 the Muskoka River, near Georgian Bay ; and in Mani- 

 toba, by Dr. R. Bell, in 1883, at Shoal Lake, Red River. 

 Mr. Simpson also is of opinion that specimens collected 

 by Mr. R. J. Fowler in the Lachine Canal at Montreal, in 

 1863, and referred by the writer to A. Lewisii, Lea, are 

 young shells of A. Footiana. 



Anodonta fragills, Larnark. (A. lacustris, Lea.) 



This shell was apparently first collected in Canada by 

 Mr. D'Urban in 1858, associated with A. Footiana, in 

 three small lakes in the valley of the Riviere Rouge, and 

 identified shortly afterwards by the late Dr. Isaac Lea 

 with the A.fragilis of Lamarck. Specimens collected by 

 Professor Macoun in 1885, from a lake six miles up the 

 Becscie River, Anticosti, were identified with A. fragilis 

 by Mr. F. R. Latchford, of Ottawa, and similar shells 

 have long been known to occur at Meach's Lake, near 

 Ottawa. Some of these Anticosti specimens were sent to 

 Mr. Simpson, who thinks that they are essentially similar 

 to shells labelled A.fragilis in Dr. Lea's collection, but 

 cannot see how these latter are to be distinguished from 

 A. lacustris, Lea, and does not pretend to be always able 

 to separate A. fragilis from A. fluviatilis. 



Anodonta implicata, Say. 



Lake Winnipeg, between Fort Alexander and Elk 

 Island, Dr. R. Bell, 1883; and Souris River, near Roche 

 Percee, Dr. A. R. C. Selwyn, 1890 ; a few specimens from 

 each of these localities, which have been identified with 

 this species by Mr. Simpson. It had previously been 

 recorded as occurring in the St. Charles River, near 

 Quebec, where it was collected by the writer in 1861. 



