240 



The Ottawa Naturalist. 



[March 



B. From a small lake in the sand hills west of Pine Creek, 

 aud north east of Carberry. 



Pelecvpoda. 



* Pisidium Roperi, Sterki. 



Several specimens, 



* Pisidium. variabile, Prime. 



Several specimens 



* Pisidium medianum, Sterki. 



Four specimens. 



* Pisidium venlricosum, Prime. 

 Several specimens. 



* Pisidium noveboracense, Prime, var. ; (or near). 



Three specimens. 



* Pisidium, resembling P. milium, Held. 

 Several specimens. 



* Pisidium, near P. pauperculum, Sterki. 



Several specimens. 



Gasteropoda. 



Planorbis (Menetus) exacuius, Say. 

 Several specimens. 



Planorbis {Armiger) crista, L. 



One specimen, since broken. 



Ottawa, Feb. 9th, 1907. 



