LAND AND FRESHWATER MOLLUSCA OF MANITOBA. 347 



place is interesting on account of its great distance to the 

 Northward of previously-known localities for the species." 

 (Bell). 



L. palustris Miill. (=Z. elodes Say). — This is by far the com- 

 monest shell in Manitoba. It is abundant in nearly all 

 lakes, ponds, and sleughs all over Manitoba wherever I 

 have been. It is exceedingly variable and possibly in- 

 cludes several allied species, but neither Mr. Taylor nor 

 myself are able to distinguish them. I obtained a semi- 

 scalariform monstrosity from a lake near Carberry. 

 " Numerous and fine in ponds at York Factory ; also 

 abundant in ponds along the Red River in Manitoba." 

 (Bell). 



L. elodes Say. — Lake of the Woods; Dufferin; Pembina, and 

 Turtle Mountains (Dawson). 



L. elodes var. umbrosa. — Sleugh near Beaver Creek. 



L. elodes var. ? — A very small form, not exceeding 



three-eighths of an inch in length. Abundant in a dry 

 sleugh near Brandon. 



L. desidosa ? Say. — Dry pond-hole near Brandon. 



L. catascopium Say. — Dufferin (Dawson). Great Play Green 

 Lake ; common in different parts of Oxford Lake (Bell). 



L. caperata Say. — Pine Creek ; Lake near Rapid City. 

 Pembina Mountain (Dawson). 



L. cygruata Say. — Dufferin (Dawson). 



L. decollata Migel. — Lake of the Woods (Dawson), 



L. hum ills Say. — Dry pond-hole near Brandon. Pembina 

 Mountain (Dawson). 



Physa ancillaria Say. — Lake of the Woods (Dawson). ^ 



P. heterostropha Say. — Appears to be widely distributed, but 

 is not common. I got fine specimens from Two Creeks and 

 from a lake at High-bluff, while smaller ones came from 

 lakes near Brandon, Birtle, Rapid City, and Carberry. Lake 

 of the Woods (Dawson). 



