300 ASSINNIBOINE AND SASKATCHEWAN EXPEDITION. 



the limestones of Lake Winnipeg or the superior Cre- 

 taceous shales. 



The importance of any evidence of the Carboniferous 

 Series in the Valley of Lake Winnipeg cannot be too highly 

 estimated. A. productus was given to me by a half-breed at 

 Eed Eiver Settlement, who declared he procured it from 

 " solid rock," which is known to occur in two places only 

 in the valley of Eed Eiver, at the Stone Fort, and above, 

 at and below the rapids, from which places both Dr. 

 Owen and I obtained Lower Silurian fossils from rock in 

 position. It is probable that the specimen figured below, 

 was procured from a boulder ; but boulders are brought 



Productus ? 



SUPPOSED TO BE FROM CARBONIFEROUS LIMESTONE. 



Fig. 1. Fig. 2. Fig. 3. 



Fig. 1, Productus from Red River. 



Fig. 2, ,, Side view. 



Fig. 3, ,, Rostral extremity. 



north each year from Minnesota by the ice of Eed Eiver; 

 it is therefore quite possible that the specimen was 

 brought by ice from the south. Under any circumstances, 

 its presence within thirty miles of the mouth of Eed 

 Eiver is an important fact, and affords good ground for 

 hope, that if the Carboniferous Series are not represented 

 on the flanks of the Eiding, Duck, and Porcupine Moun- 

 tains, they will be found in the State of Minnesota, or 



