262 Canadian Record of Science. 



Unio pustulosus, Lea. (?= U. bulletins, Rafinesque.) 



Grand River, Caledonia, Ontario, J. Townsend, 1885 ; 

 one specimen. Thames River, at Chatham, Professor 

 Macoun, 1894; two specimens. 



Unio radiatus (Gmelin), Lamarck. 



No new localities are to be recorded for this common 

 eastern species, which has long been known to range from 

 Nova Scotia to at least as far to the westward as Ottawa. 



Unio Rangianus, Lea. (Perhaps a var. of U. yerplexus, Lea.) 



Lake Erie, at Kingsville, Ontario, J. T. McQueen, 1890 ; 

 one perfect specimen of the shell of the female. 



Unio rectus, Lamarck. 



Common in the St. Lawrence and Ottawa rivers, and 

 in western Ontario. In Manitoba, it was collected by 

 Dr. G. M. Dawson, in 1873, from the Roseau River, and 

 by Mr. J. B. Tyrrell, in 1888, in the Assiniboine River at 

 Millwood. 



Unio rubiginosus, Lea. (1=U. flavus, Rafinesque.) 



In Ontario this shell has been collected by Professor 

 Macoun, in 1890, in the Grand River at Cayuga, and in 

 1894, in the Thames River, at Chatham. In Manitoba, it 

 was found by Dr. G. M. Dawson, in 1873, in the Red and 

 Roseau Rivers, and by Dr. R, Bell, in 1883, in Lake Win- 

 nipeg, between Port Alexander and Elk Island. 



Unio subrotundus, Lea. 



Grand River, Caledonia, J. Townsend, 1885, one speci- 

 men, which "approaches U. ebenics" (C. T. Simpson). Port 

 Dover, Lake Erie, a specimen " which approaches TJ. 

 solidus, Lea," (C. T. Simpson), and Rondeau, Lake Erie, 

 one specimen, Professor Macoun, 1894. 





