FOSSILS FROM LAKE WINNIPEG. 



285 



CHAZY FORMATION". 



Pine exposures of the Chazy formation occur on Deer 

 Island, Punk Island, and along the west coast of the 

 lake north of Big Grindstone Point as far as the Cat 

 Head. They appear in the form of cliffs, varying 

 from twenty-five to forty-five feet in altitude at nearly 

 all points and promontories. The character of the 

 rock is described in Chapter XXIII. At the Narrows the 

 three limestone promontories, the Bull's Head, Limestone 

 Cave Point, and Whiteway's Point, approach within a few 

 miles of the Laurentian series on the east coast. The 

 strait from Whiteway's Point to the Dog's Head is not 

 more than three miles across. Before this narrow channel 

 was excavated, Lake Winnipeg must have been divided 

 into two parts, like Lakes Manitobah and Winnipego-sis, 

 and it is not improbable that near the Dog's Head a rapid 

 river or falls formerly existed. The relation of the two 

 lakes would then resemble the present relation of Lake 

 Manitobah, the Little Saskatchewan and Lake Winnipeg. 



The following enumeration and description (between 

 brackets) of fossils forming part of my collection from the 

 Silurian and Devonian rocks of this region, are from the 

 pen of Mr. E. Billings, F.G.S., Paleontologist to the 

 Canadian Geological Survey. 



Pldntce. 



[Two species of Fucoids from Punk Island in Lake 

 Winnipeg, resembling forms which occur in the Chazy 

 sandstone. 



Zoophyta. ( 



The only coral is a species allied to Columnaria alveo- 

 lata. It is from Grindstone Point, Lake Winnipeg. 



