78 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Seb. 



vicinity of Santa Cruz also; for several specimens of Peromys- 

 cus calif ornicus (Nos. 8547-8549, U. S. Nat. Mus.) are 

 labelled "Santa Cruz, 1861.'"' 



From November 4, 1861, to May 24, 1862, we ag^ain find 

 him at San Diego (Cooper, 1870a, p. 68), and Whitney 

 records the fact (1870c, pp. ix and x) that "Dr. Cooper was 

 steadily employed in collecting from December, 1860, to April, 

 1862, and during a considerable portion of the year 1863, 

 being assisted for six months of 1862 by Dr. Edward Palmer. 

 The regions examined were chiefly the Colorado Valley near 

 Fort Mojave, the route to the coast from that fort, the vicin- 

 ity of San Diego and San Pedro, and Santa Barbara and the 

 islands off the coast." The accessible data pertaining to the 

 period in question consist of a few scattered specimens and 

 published notes. From these we learn that Dr. Cooper was 

 in Stockton in February, 1863; that he collected in Santa 

 Clara and San Mateo counties in March, 1863; that he was 

 at Oakland and Santa Barbara in April; at the latter locality 

 again in May; at Santa Barbara Island^ in May and June, 

 where he spent six weeks during this and the succeeding 

 month; on Catalina Island in June and July, as well as during 

 the last days in October; on San Clemente and San Nicolas 

 islands for a few days about the first of July; on the main- 

 land in the neighborhood of San Pedro later in July; in the 

 Sierran foothills in August; and for twenty days in Septem- 

 ber in the high Sierras between the altitudes of 5000 and 8000 

 feet, not far from Lake Tahoe (Cooper 1870a, p. 72)). 



"In 1864 portions of the Sierra Nevada and the coast from 

 Baulines [=Bolinas] Bay to Santa Cruz were zoologically ex- 

 plored" (Whitney, 1870, p. x). On May 24 of this same year 

 Governor Low commissioned Dr. Cooper Assistant Surgeon 

 in the Second Cavalry, California Volunteers, with which 

 regiment he served until its muster out (Emerson, 1899, p. 4). 



According to Whitney (1870, p. x). Dr. Cooper was en- 

 gaged in 1865 in the preparation of reports, and subsequent 

 to that time he is said to have visited at the expense of the 



• That the entry "Santa Barbara I." on Cooper's specimen labels refers to Santa 

 Barbara Island and not to the Santa Barbara group is indicated by a reference to 

 the locality in one of his shell papers (1863a, p. 56). He says: "The island is about 

 seventy-five miles from the town [of Santa Barbara], and thirty-five from the near- 

 est main land." 



