I 3 6 



LAND AND FRESH WATER MOLLUSKS 



Range. — Frances Lake and Finlayson Lake, Yukon District, Liard 

 River drainage (Dawson); Lake Michigan, 12 fathoms (Walker). 



Identified by Dr. Sterki, a species related to rhomboideum and occi- 

 dentale, but yet unfigured. 



Sphserium solidulum Prime. 



Cyclas solidida Prime, Proc. Boston Soc. Nat. Hist., iv, p. 158, 1851. 

 Spharium solidulum Prime, Mon. Am. Corbie, p. 36, fig. 27, 1865. 



Range. — Eastern United States, from New Mexico and Louisiana 

 to the Great Lakes, and Manitoba. 



In Manitoba, at Winnipeg, Brandon, and the Red River of the 

 North ; in Alberta, at Egg Lake. 



Sphserium stamineum Conrad. 



Cyclas staminea Conrad, Am. Journ. Sci., xxv, p. 342, 



pi. 1, fig. 5, 1834. 

 Sphcerium stamineiun Price, Mon. Am. Corbie, p. 38, fig. 

 30. 1865. 



Range. — Eastern United States, northward to 

 Manitoba. 



Manitoba (Hanham). 



The type locality for this species is Alabama. In 1865 Mr. Prime 

 united with it the Cyclas fuscata of Rafinesque (Ohio) and the C. 

 bulbosa Anthony from Arkansas. Later collectors have found it 

 widely distributed over the eastern portion of the continent. 



Sphaerium rhomboideum Say. 



Cyclas rhomboida Say, Journ. Acad. Nat. Sci. Phila., II, p. 380, 1822. 

 Cyclas elegans Adams, Boston Journ. Nat. Hist., ill, p. 330, pi. ill, fig. 11, 



1840. 

 Spharium rhomboideum Prime, Mon. Am. Corbie, p. 39, fig. 31, 1865. 



Fig. 100. Sphae- 

 rium stamine- 

 um Conrad. 



101 102 103 



Fig. ioi. Sphaerium rhomboideum Say. 



Fig. 102. Sphaerium dentatum Hald. 



Fig. 103. Sphaerium fabale Prime. 



Range. — New England to Michigan, and northwestward. 

 Lake Superior ; Manitoba at Pine Creek and in Lake Winnipeg. 



