REPORT OF ASSISTANT SECRETARY. 47 



2. Exploration of the Black Hills and Loup Fork, under Lieutenant 

 G. K. Warren, U. 8. A — Lieutenant Warren made his third visit to 

 the Upper Missouri and Yellowstone region, accompanied, as on pre- 

 vious expeditions, by Dr. Hayden as geologist and naturalist. Very 



fc large collections in all branches of natural history were made and 

 brought home, tending, in great measure, to complete our knowledge 

 of the distribution of species over the high plains of the west. 



3. Wagon road to Bridger' s Pass, under Lieutenant F. T. Bryan, JJ. 

 8. A. — During his second year's work on this road to Utah Territory, 

 Lieutenant Bryan, as before, was accompanied by Mr. Wm. S. Wood, 

 who continued and completed the collections of the preceding year, in 

 securing many species not previously obtained. Dr. Wm. A. Ham- 

 mond, U. S. A., who accompanied the party as surgeon, also made a 

 separate and independent collection of much interest, not only on the 

 route, but while stationed at Fort Riley. In this he was for a time 

 assisted by Mr. J. Xantus de Vesey. 



4. Wagon road to California via South Pass, under Wm. M. Ma- 

 graio. — This party, accompanied by Dr. James Gr. Cooper, as surgeon 

 and naturalist, aided by C. Drexler, reached Fort Laramie during the 

 autumn. The collections in all departments were large and import- 

 ant, and were accompanied by copious notes on the species observed. 



5. Survey of the southern boundary of Kansas, under Lieutenant 

 Colonel Johnston, U. 8. A. — A valuable collection of specimens in 

 alcohol was made daring the survey by J. H. Clark, esq., astron- 

 omer of the expedition. 



6. Survey of the Isthmus of Darien, under Lieutenant N. Michler, JJ. 

 S. A. — This expedition, accompanied by Mr. A. Schott and Messrs. 

 Wm. S. and Charles Wood, sailed for Carthagena in October, pro- 

 ceeding thence to the isthmus. While at Carthagena a collection of 

 birds and shells was made and sent to Washington, and others are on 

 their way. 



Among government expeditions fitted out in 1857, but from which 

 no collections have yet been received, are the following : 



7. Wagon road route to California via El Paso and Fort Yuma, 

 under Colonel Leech. — This expedition was accompanied by Dr. McCay 

 and Mr. Hays, both of whom were prepared to make collections in 

 natural history. 



8. Exploration of the La Plata and its tributaries, under Captain 

 ^ Page, U. S.N. — Christopher Wood doing duty as zoological collector. 



9. Artesian well expedition, on the Llano Estacado, under Captain 

 Pope, JJ. S. A. — This is the third expedition to the sterile regions of 

 western Texas, conducted by Captain Pope. 



