1905 | FRESH-WATER SHELLS FROM THE YUKON. 65 
A few specimens in the Museum of the Canadian Survey, 
which Dall thinks are ‘‘ probably the true V. szncera of Say, or a 
variety of it,”’ were collected on the island of Anticosti by Professor 
Macoun in 1884, and on the Attawapiskat and Kawinogans rivers 
by Mr. McInnes in 1904. Those from the Kawinogans River have 
the outer half of the last volution free and partially uncoiled. 
Limnea stagnalis appressa Say. 
Stewart River, near Mayo River; two specimens. 
Limnea Randolphi Baker. 
Frances Lake, eleven fine and large specimens ; Finlayson 
Lake, eleven specimens, mostly immature; Lewes River, one small 
specimen ; and Lake Marsh, Lewes River, seventeen fine and 
mostly adult shells. 
Limnea palustris Muller. 
Frances Lake, two specimens. 
Limnea Vahlit Beck (Dall). 
Frances Lane, nine specimens ; Finlayson Lake, twelve 
specimens. 
Limnea arctica Lea (Dall). 
=Limnea Pingelit Beck, var. (Dall). 
Stewart River, near Mayo River, two specimens. 
Planorbis trivolvis Say. 
Stewart River, near Mayo River, seven specimens of a rather 
large, depressed and thin-shelled form of this species, with the 
spiral angulation obsolete. 
Segmentina armigera Say. 
Stewart River, near Mayo River; one specimen. 
Physa sp. indet. 
Finlayson Lake ; one very immature specimen. 
Ottawa, April 5, 1905. 
