4 EEPOET UNITED STATES GEOLOGICAL SUEVEY. 



but estimated. For this reason I would beg leave to submit the strictly 

 geological report merely as a j)reliminary one, expecting to enlarge it 

 and furnisli a larger number of definitely established data at some future 

 time, after the necessary maps have been i)repared. 



To the members of the party, and especially to my assistant, Mr. 

 Clymer, are due my sincere thanks for their cooperation during the field- 

 season. Dr. Coues has kindly furnished me with the names of various 

 animals which we observed during the trip, and I am under obhgations 

 to him therefor. Dr. Vasey has rendered the same service with refer- 

 ence to the plants. 



HoiDing that the subjoined report may meet your requirements, I have 

 the honor to remain, sir, very respectfully, youi' obedient servant. 



FEEDEEIC M. EXDLICH. 



Dr. E. Y. Hayden, 



Geologist-in-cJiarge United States Geological 



and Geographical Survey of the Territories. 



