46 
Family, Sphaeriidae 
Sphaerium sulcatum (Lam.) 
Botsford lake, one valve is referred to this species by Dr. Sterki. 
Recorded by Whiteaves from Knee lake, and by Mozley from Rainy lake, 
near Wade, Ontario, as well as from parts of Manitoba. 
Sphaerium fallax Sterki 
Fitchie, Cat, Hill, Bamaji, Hamilton, and Botsford lakes; Marching- 
ton river. A rather variable Sphaerium distinct from sulcatum and appar- 
ently the dominant large member of this genus in the north. Some of the 
material listed as simile by Whiteaves and others may be of this species. 
Sphaerium acuminatum (Prime) 
Lakes St. Joseph and Bamaji, more common in the latter. Not noted 
by Whiteaves. 
Sphaerium vermontanum (Prime) 
Botsford lake. Recorded from Mills lake, Mackenzie River district, 
by Whittaker. 
Sphaerium emarginatum (Prime) 
Hamilton lake. Recorded by Whiteaves from Attawapiskat river and 
from Knee lake on Hayes river. 
Sphaerium tenue (Prime) 
Bamaji lake. Recorded by Whittaker from several places in Mac- 
kenzie River district. 
Sphaerium sp. indet. 
Several Sphaeria not at present determinable were collected in lakes 
Kimmewin, Bamaji, Hill, and Fitchie. Much of this material is beach 
debris, rather worn. 
Other species of Sphaerium have been recorded from this area by 
Whiteaves and these are listed below for completeness. 
Sphaerium imlkcri Sterki — Attawapiskat river 
Sphaerium stamineum (Conrad) — Kawinogans river, Abit.ibi lake 
Sphaerium jlavum (Prime) — Root river, lac Soul, English river above lac Seal 
Sphaerium slriatinum (Lam.) — Lake Abitibi, Ontario side 
Sphaerium rhomboideum (Say) — Lake St. Joseph, Albany river 
Mozley records the following species from the boundary between 
Manitoba and Ontario: 
Sphaerium cras&uni Sterki 
Sphaerium solidulum (Prime) 
Sphaerium strifilinum (Lam.) 
Sphaerium occidcnkUe Prime 
Musculium rosaceum (Prime) 
St. Joseph, Botsford, Hamilton, Kimmewin, Kapikik, and Pashkoko- 
gan lakes. Found by Whittaker in Mills lake, Mackenzie River district, 
indicating a wide northward distribution. Published references to this 
species from Ontario and other parts of western Canada are rare. 
