F. GEOGRAPHY. 251 



orado, that yielded more than one hundred species of verte- 

 brate remains, upward of seventy of them new to science. 



Professors Leidy, Porter, and Lesquereux were also suc- 

 cessful, and will contribute nwich new and valuable matter 

 in their respective branches to the Seventh Annual Report. 



Mr. Holmes, the artist of the Survey,.made detailed pano- 

 ramic views from every peak visited, bringing out in a re- 

 markably clear manner all the peculiar mountain forms as 

 well as the geological structure. 



The results of the explorations under Dr. Hayden in 1873 

 will constitute the Seventh Annual Report, to appear early in 

 1874. 



The following is a list of members of the survey prosecuted 

 by Dr. Hayden during 1873 : 



F. V. Hayden, United States geologist, in charge ; James 

 T. Gardner, geographer ; James Stevenson, quartermaster and 

 chief executive officer ; W. H. Jackson, photographer ; W. H. 

 Holmes, artist ; Joseph H. Batty, ornithologist ; Lieutenant 

 W. M. Carpenter, U. S. A., entomologist ; J. M. Coulter, bot- 

 anist. 



First Division''. A. R. Marvine, assistant geologist and di- 

 rector ; G. R. Bechler, topographer; S. B. Ladd, assistant to- 

 pographer. 



Second Divisio7i. Henry Gannett, topographer and direct- 

 or ; H. W. Stukle, assistant topographer ; Dr. A. C. Peale, first 

 assistant geologist ; W. R. Taggart, second assistant geol- 

 ogist. 



Third Division. A. D. Wilson, topographer and director; 

 George B. Chittenden, assistant topographer; Dr. F. M. End- 

 lich, assistant geologist ; Franklin Rhoda, computor. 



E. T. Luce, W. S. Holman, C. T. Noonan, S. H. Nealy, Sew- 

 ard Cole, S. C. Jones, ijeneral assistants. 



LIEUTENANT WHEELER's EXPLOBATIONS IN 1873. 



Among the various government explorations prosecuted 

 during the year 1873, one of the most prominent is that un- 

 der the charge of Lieutenant George M. Wheeler, of the 

 United States Engineers, the object of w^hich is a thorough 

 examination and determination of the physical and natural 

 history of the regions west of the one hundredth meridian. 

 At the very foundation of the plans of this survey is a series 



