Notes on Recent Canadian Mollusca. 15 



Helix chersina=fulva, and L appressa and jugularis=stag- 

 nalis. Fronn our present knowledge of the distribution of 

 H. albolabris and H. thyroides, it is certain that the young 

 mesodon from Moose Factory was not thyroides. The list is of 

 univalves only ; but bivalves also were collected. Dr. Lea has 

 described two anodons collected on this expedition — A. Kenni- 

 cotti, from Great Slave Lake, at Fort Rae and north end of 

 Lake Winnipeg, and A. Simpsoniana, from Fort Rae, (Jour. 

 Acad. Nat. Sci., 1862: 212 and 214). When two new species 

 were found, ather bivalves were undoubtedly collected. Who 

 will furnish the list, if it is in existence ? L. 



A MANITOBAN LIST. 



Another list of special interest to Canadian students of 

 conchology — or, to use the fashionable term, malacology — 

 appears in the Natural History Bulletin of the State L^niversity 

 of Iowa, Vol. H, 1893, pp. 291 and 292. It is a catalogue pre- 

 pared by my old friend, Mr. Shimek — to whom I am indebted 

 for a copy — of the shells collected by Mr. C. C. Nutting, on the 

 Lower Saskatchewan in 1892. The precise locality of the expe- 

 dition is not stated, but collections appear to have been made 

 not far from Lake Winnipeg. The list is as follows : 



Bithynella obtusa Lea. Planorbis bicarinatus Say. 

 Valvata tricarinata Say. " albus Mull. 



Succinea ovalis Gld. " parvus Say. 



" avara Say. Segmentina armigera Say. 



Limnsa stagnalis L. Sphseriuni sulcatum Lamk. 



" palustris Mull. " striatirum Lamk. 



" desidiosa Say. '• occidental Prime. 



" caperata Say. Pisidium sp. indet. 



Physa gyrina Say. Unio luteolus Lamk. 



Planorbis trivolvis var. Margaritana complanata Bar. 



macrostomus Whiteaves. Anodonta ferussaciana Lea. 



The expedition under Mr. Nutting was organized by the 

 University of Iowa. It was an extension of the university 

 work in zoology from mere study within the walls of the uni- 

 versity building to practical observation and collection in a 

 field where material abounded. The results are set forth in the 

 Bulletin mentioned, which is a valuable contribution to the 

 zoology of Canada. It may be of some moment to those 



