196 



Dr. R. Bell, 1874. At the second and third rapids of the Nelson River, 

 Keewatin, Dr. R. Bell, 1879. Elk Island, Big Island, Grindstone Point, 

 Washow Bay, Bull Head Bay, Dog Head, Pike Head or Jackfish Bay, 

 and Kinwow Bay, all in or on Lake Winnipeg ; T. 0. Weston, 1884. 

 East Selkirk, T. C. Weston, and A. McCharles, 1884. North end 

 of Big Island, Big Grindstone Point " and Little Black Island, " Lake 

 Winnipeg, J. B. Tyrrell, 1889." Little Black Island, Sturgeon, Snake 

 and Black Bear islands. Lake Winnipeg, D. B. Dowling and L. M. Lambe, 

 1890; Dog Head, L. M. Lamhe, 1890. Commissioners, Little Tamarack 

 and Punk islands. Grindstone Point, Selkirk Island, and west shore 

 of Lake Winnipeg, north of the Saskatchewan, and opposite the north 

 end of Selkirk Island, D. B. Dowling, 1891. East side of Sturgeon 

 Lake, District of Saskatchewan, J. B. Tyrrell, 1894, 



" It is one of the most abundant and characteristic fossils of the Galena- 

 Trenton limestone of Manitoba, and, according to Messrs. Weston, Tyrrell, 

 Dowling and Lambe, it always occurs with the flat side uppermost in 

 the rock. 



c. 



Fig. 11. Maclurea Manitotcnsis. — Inner side of an operculum, supposed 

 to be that of a large specimen of this species, from Jack Fish , , ., 

 Island. Natural size. 



