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. ) by Dr. Sterki.) 



SphcBrium sulcatum Lam. (Christy, Dawson and Holland.) 



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

 recorded by Christy & Dawson.) 



Sphccriuin striafinum Lam. (Christy & Dawson.) 

 " stramineum Conrad. (Dawson). 

 " rhomboideum Say. (Christy & Dawson.) 

 " jayanum Prime. (Christy.) 

 " tenue Prime. Souris River (Dawson). 

 " trausversum Say. Playgreen Lake (Bell). 



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



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



Splurrium 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). 



" ferrissii 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 alutus Say. Have taken some fine shells along the banks of 

 the Red River here. (Christy & Dawson). 



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

 " borealis A. F. Gray. Lake of the Woods (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.) 

 " ligamenlinvs Lam. Roseau River (Dawson). 

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

 lias been taken in Lake Winnipeg. 



