8 GEOLOGICAL SUEVEY OF THE TEEEITOEIES. 



Mr. James Stevenson acted as quartermaster and executive officer of 

 the survey, and performed the labors incident to his department with 

 judgment and fidelity. 



Mr. Eobert Adams, jr., of Philadelphia, acted as assistant quarter- 

 master, with entire satisfaction. 



By the kind permission of General Sherman and General Ord, Lieut. 

 W. L, Carpenter, U. S. A., accompanied the survey as naturalist, and 

 the result of his zeal in the work is well shown Jin subsequent portions 

 of this report. 



Prof. W. D. Whitney, of Tale College, rendered most valuable assist- 

 ance to Mr. Gardner in his geographical work, for the months of July 

 and August, without compensation from the Government. 



Mr. Leo Lesquereux is permanently attached to the survey as paleon- 

 tologist. He has just completed a memoir on the fossil flora of the 

 Dakota group, with thirty plates, and is now preparing a second me- 

 moir on the flora of the Lignitic group, which will contain over sixty 

 plates. This work will be ready for 'publication in about six months. 



Mr. P. B. Meek, the eminent paleontologist, is also a member of the 

 survey, and has nearly completed his most valuable, but long delayed, 

 memoir on the invertebrate fossils of the West, which will go to press 

 the present summer. It will contain forty-five beautifully-engraved 

 plates, all of which are now finished. 



Prof. C. Thomas will remain in charge of the office, superintending 

 the printing of the reports while the main party is in the field. 



The survey is under obligations for most valuable jpapers from Dr. A. 

 S. Packard, S. I. Smith, A. E. Verrill, H. A. Hagen, and Baron E. Os- 

 tensacken. 



I have only words of commendation for all the members of the survey 

 for their devotion to the work. 



To the officers of the various railroads in the W'est, to the citizens of 

 Colorado, and to the press all over the country, the survey is under 

 many obligations. 



HTSTORY OF THE SURVEY. 



A brief history of the survey may not be out of place in this connec- 

 tion and at the present stage of its progress. In the spring of 186'^, 

 when the Territory of Nebraska was admitted into the Union as a State, 

 Congress passed a bill setting apart the unexpended balance of the ap- 

 propriation for the legislative expenses of the Territory for the purpose 

 of procuring a geological survey of the State. The amount proved to 

 be about $5,000, and the summer of 1867 was occupied in making an 

 examination of the eastern portion of the State. A preliminary report 

 was published in the annual reportof the Commissioner of the Land-Office 

 for that year. Some four years after, a final report, in octavo, was printed 

 by Congress. 



In the spring of 1868, $5,000 more was appropriated, and the survey 



