170 THe OtTtrawa NATURALIST. | December 
* Spherium Walkeri, Sterki. ’ 
Head waters of the Chibougaman branch of the Nottawa¥ * 
River, Northern/Ouebec, “A. Pow, Moos); tour “jiving ” 
and perfect specimens. 
* Sphertum (Muscultum) Raymond: ? J. G. Cooper. 
Head waters of the Columbia River at Upper Columbia Lake, 
BiG,, J. B. Wyrreil, 1883 “two specimens.s: 
_Pisidium Idahoense, Roper. 
McLeod Lake, Peace River drainage system, B.C., G. M 
Dawson, 1879 ; one specimen. 
*Pistdium Ropert, Sterki. 
Peat bog near middle branch of Old Man River, Alberta, J 
B. Tyrrell, 1883 ; eighteen specimens. 
* Pisidium Mainense, Sterki. 
Jupiter River, Anticosti, John Macoun, 1884; twenty-six 
specimens. ‘‘ Generally somewhat less characteristic in shape 
than specimens from Maine and Michigan.” Sterki. 
GASTEROPODA. 
Amnicola emarginata, Kuster. 
Mouth of Red River, Manitoba, J. H. Panton, 1884 ; several 
specimens. Shell River, Manitoba, J. B. Tyrrell, 1887 ; two 
specimens. 
“-Ancylus parallelus, Haldeman. 
Chartron’s Island, Aylmer, Que., L. M. Lambe, 1¢89. eight 
specimens ; and Root River, Keewatin, W. McInnes, 1905, 
one specimen. Lost Lake, Comox, V.I., John Macoun, 1887, 
two specimens ; and Burrard Inlet, B.C., John Macoun, 1880, 
seven specimens. 
As A. riviularis, Gould, is ‘‘ considered by Haldeman to be 
this species and not Say’s A. rzvularis,” it may be that the 
Montreal specimens that Dr. B. Bell identified with A. 
rivularis in 1859, are parallelus. 
Ancylus tardus, Say. 
Crane Lake, Assiniboia, John Macoun, 1894; eighteen speci- 
