290 ASSINNIBOINE AND SASKATCHEWAN EXPEDITION. 



colour of its weathered surface is a pale yellowish grey, 

 but of fresh surfaces, a white gray. Dr. Owen, who 

 visited the Eed Eiver Settlements in 1848, enumerates 

 the fossils he found near the Stone Fort in his Eeport 

 published in 1852. He says : — 



" About twenty miles below the mouth of the Assinni- 

 boine, near lower Fort Garry, solid ledges of limestone 

 are exposed of a light buff colour, sometimes mottled, 

 spotted, or banded with light brown. Immediately oppo- 

 site the Fort, a considerable amount of rock has been 

 quarried, and used in the construction of the building. 

 In these beds, I succeeded in finding several well-defined 

 and characteristic fossils, sufficient to establish, without 

 the least doubt, the age of the Eed Eiver limestones. 



They are : Favosites basaltica ; Coscinopora Sulcata ; he- 

 mispherical masses of Syringopora ; Choetetes lycoperdon ; 

 a Conularia ; a small, beautiful undetermined species 

 of Pleurorhynchus ; Ormoceros Brongniarti ; Pleuroto- 

 maria lenticularis (?) ; Leptama alternata ; Leptcena 

 plano-convexa (?) ; Calymene senaria ; and several speci- 

 mens of the shield of Illwnus crassicauda. 



Many of these are identically the same fossils which 

 occur in the lower part of F. 3, in Wisconsin and Iowa, 

 in the blue limestones of Indiana, Ohio, Kentucky, and 

 Tennessee, and also in the lower Silurian of Europe. 



The Coscinopora is precisely the same as the coral, 

 which is particularly characteristic of the lower beds of 

 the upper magnesian limestone of Wisconsin. The speci- 

 mens of Favosites basaltica cannot be distinguished from 

 those which abound in the upper magnesian limestones of 

 Wisconsin and Iowa, and the lower coralline beds of the 

 Falls of the Ohio. It is also worthy of note that these 

 limestones of Eed Eiver, like their equivalents in Iowa 

 and Wisconsin, are highly magnesian, containing from 



