DEPARTMENT OF THE INTERIOR. 



11 E P K T 



UNITED STATES GEOLOGICAL SURVEY 



T II E T E II 11 1 T O R IBS. 



F. V. HOYDEN", 



UNITED STATES GEOLOG IST-IN-C H AEGE. 



VOLUME X 



WASHINGTON: 



GOVERN M E NT PRINTING OFFI C E 

 187 6. 



