622 GEOLOGICAL SURVEY OF THE TERRITORIES. 
PLATE I. 
The skeleton of isneot yto cunicularia hypogea. 
Notr.—The drawings from which the lithographic plates and the woodcuts of the 
bones in these monographs were made were executed by the author; all the cuts of 
external characters and illustrations of the birds are from Baird, Brewer and Ridg- 
way’s North American Birds, and kindly lent me by Professor Baird. 
