SIDNEY I. SMITH, 



New Haven, Conn. 



DEPARTMENT OF THE INTERIOR. 



REPORT 



OF THE 



UNITED STATES GEOLOGICAL SURVEY 



THE TERRITORIES 



F. V. HAYDEN, 



UNITED STATES GEOLOGIST-IN-CHARGE. 



VOLUME XII. 



■WASHINGTON: 



GOVKliNMENT PEINTING OFFICE. 



1879. 



