3 
Correlation of the Fauna 
Any correlation of the Beaverfoot fauna has to be made mainly by 
means of the corals and brachiopods. The Rocky Mountain collections 
do not include the ostracod and bryozoan fauna of Stony mountain, 
Manitoba, and Bighorn mountains, Wyoming. Although the Beaverfoot 
Figure 1. Index map showing localities in southeastern British Columbia and western Alberta 
from which Upper Ordovician fossils have been collected. 
is more closely allied to these two than to the Richmond of central and 
eastern America, an examination of the internal structure of the brachiopods 
has shown that in almost every case there is a very definite specific differ- 
ence. These differences in Dinorthis, Rhynehotrema, etc., are discussed 
in detail under the descriptions of the fossils. Of the corals Paleofavosites 
