THE NAUTILUS. 



3G7. Succinea avara Say. Rather common here. (Christy, 

 Dawson and Taylor.) Var. vermeta Say ? (Referred to this by Dr. 

 Sterki.) A small colony taken under logs on railway bank near the 

 city. (If only S. avara, then an unusually large coarse form.) 



370. Succinea oregonensis Lea. (A few examples referred to this 

 species by Dr. Sterki). From 'Winnipeg. 



Carychium exiguum Say.) By no means abundant here. (Named 



" exile Lea. j by Dr. Sterki.) 



Sphceriiim sidcatum Lam. (Christy, Dawson and Holland.) 



" solidulum Prime. Common here in Red River. (Also 

 recorded by Christy & Dawson.) 



Spfiterium striatinum Lam. (Christy & Dawson.) 

 " stramineum Conrad. (Dawson). 

 " rhomboideum Say. (Christy & Dawson.) 

 " jayamun Prime. (Christy.) 

 " tenne Prime. Souris River (Dawson). 

 " transversum Say. Playgreen Lake (Bell). 

 " simile Say. A single valve was in a lot of S. solidulum 

 referred to Mr. Ed. W. Roper for naming. 



Sphcerium partumeium Say. (Dawson.) One specimen taken 

 here, kindly named by Mr. Roper. 



Pisidium virginicum Gmel. Lake of the Woods (Dawson). 

 " variabile Prime. Pine Creek (Christy). 

 " abditum Hald. (Holland). 



" ferrissli Sterki. These are the only Pisidia I have found 

 here, and I took a small colony of them in moss in a dried-up swamp 

 late in the year. Only a few appeared to be full grown (named by 

 Dr. Sterki). 



Unio alatus Say. Have taken some fine shells along the banks of 

 the Red River here. (Christy & Dawson). 



Unio osperrimus Lea. A few from Red River here. (Christy). 

 " boreal/'s A. F. Gray. Lake of the AVoods (Christy). 

 " canadensis Lea. (Taylor.) 



" boydianius Marsh. Red River here. Kindly named by Mr. 

 Ferriss. 



Unio gracilis Barnes. Not uncommon in Red River. 

 " lachrymosus Lea. (Bell, Dawson & Taylor.) 

 " ligamenlimis Lam. Roseau River (Dawson). 

 " hippnpeus, I understand from Mr. Ferriss that this species 

 has been taken in Lake Winnipeg. 



