Recent Canadian Unionidce. 255 



Anodonta Marryattana, Lea. 



Lake Hannah, Nipigon Eiver, and east side of Lake 

 Nipigon, Ontario, Professor Macoun, 1884 ; and Fairford 

 Eiver, Manitoba, J. F. Whiteaves, 1888 ; as identified by 

 Mr. Simpson. 



Anodonta Nuttalliana, Lea. (A. Oregonensis, Lea.) 



Okanagan Lake, B.C., A. J. Hill, 1882; two specimens 

 of the variety Oregonensis. Near Victoria, V. I., James 

 Fletcher, 1885, and Eev. G. W. Taylor, 1889. Nicola 

 Lake, B.C., Dr. G. M. Dawson, 1889 ; three specimens of 

 the typical form and one of the variety Oregonensis. 

 Salmon Arm, Shuswap Lake, B.C., Dr. Dawson, 1894 ; 

 several examples of both forms of the species. Stream 

 entering Clayoquot Sound, V. I., at Stubbs Island^W. 

 Spreadborough, 1894. 



Anodonta ovata, Lea. 



Coulee No. 5, Vermilion Eiver, Alberta, J. B. Tyrrell, 

 1886. 



Anodonta Pepiniana, Lea. 



Specimens which Mr. Simpson refers to this species 

 were collected by Dr. E. Bell, in 1883, from the Winnipeg 

 Eiver, Manitoba, and in 1886, from the Attawapishkat 

 Eiver, in the Severn district, which now forms the eastern 

 part of Keewatin. Two left valves of a shell which may 

 be referable to this species were collected by Mr. J. B. 

 Tyrrell, in 1884, at the Lake of the Woods. Mr. Simpson 

 is of the opinion that A. Pepiniana may be merely a 

 variety of A. Simpsoniana, Lea. 



Anodonta Simpsoniana, Lea. 



In Ontario this species was collected by Dr. A. E. C. 

 Selwyn in 1883, at Black Bay, Lake Superior; by Prof. 

 Macoun, in 1884, at the north end of Lake Nipigon, in 



