75 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Sek. 



There ensues a period covering the years 1858-1859 for 

 which I have not found any published summary of Dr. 

 Cooper's activities. That he made a trip to Florida in 1859 

 is indicated by the fact that specimens of mammals numbered 

 145264-145269, United States National Museum, were col- 

 lected by him in that State during that year, the only precise 

 localities mentioned being New Smyrna [east coast of Florida, 

 Volusia County] and the Miami River [Biscayne Bay, Dade 

 County]. At the latter locality specimens were taken March 

 25 to 31, inclusive. While in New York and the east at this 

 period his time was doubtless occupied in writing. Three 

 reports, each of which must have entailed considerable labor, 

 shortly appeared, comprising Cooper's accounts of the botany 

 and mammals of the route of the western division of the 

 Stevens Survey (see Cooper, 1860a and 1860b, and Suckley 

 and Cooper, 1860). 



In 1860 we find Dr. Cooper making his first real transcon- 

 tinental trip, in the capacity of contract surgeon with a de- 

 tachment of recruits from New York to "Fort Columbus. 

 Department of Oregon."" This assignment occupied him 

 until October 19, 1860, but his contract was continued until 

 December 1 of that year. From Dr. Cooper's contributions 

 to the American Naturalist under the title "The Fauna of 

 Montana Territory,"^ which deal with the observations and 

 collections made by him on this trip, we learn that his itin- 

 erary in the Rocky Mountain and Pacific region included 

 Fort Benton, Montana, and Forts Colville and Vancouver, 

 Washington. On October 9, 1860, Dr. Cooper collected the 

 type of Lagurns pauperrimus, one of the most interesting 

 specimens he ever .secured, on the Great Plains of the Colum- 

 bia River. "Again as a student," says Emerson, "we find 

 him collecting along the coast from San Francisco to San 

 Diego (1899, p. 4)". 



It was not long before Dr. Cooper was serving once more 

 as contract surgeon in the Army, with headquarters at Fort 

 Mojave,^ on the Colorado River (See Cooper, 1869, pp. 182, 



• Fort Vancouver. 



» See Amer. Nat., vol. 2, 1868, pp. 528-538, 596-600, vol. 3, 1869, pp. 31-35, 73-84, 

 124-127. 



• Fort Mojave: Arizona side of the Colorado River, close to the point at which 

 the boundary lines of Nevada, California and Arizona meet (see Whitney's Map of 

 California and Nevada, State Geological Survey of California, 2nd cd., 1874). 



