EXPLANATION OF THE PLATES.* 
PLATE I. (California and Oregon.) , 
Page. 
Fig.— Vulpes littoralis, Bd.—Coast fox.—Island of San Miguel, California. 143 
PLATE II. (47tli parallel.) 
Fig. 1— Lynx fasciatus, Raf.—Red cat, adult.—Washington Territory. 96 
Fig. 2— ?FeUs conoolor, L.—Panther, very young.—Washington Territory. 83 
(This may possibly belong to the preceding species.) 
PLATE III. (California and Oregon.) 
Fig. 1— Putorius xanthogenys. —Yellow-cheeked weasel.—San Francisco, California... 176 
Fig. 2— SpermopMlus beecheyi, Rich.—California ground squirrel.—Tejon Pass, Cal... 307 
PLATE IV. (41st 2 )arallel.) 
Fig. 1— Spermophilus grammurus. —Rock squirrel.—Fort Webster, H. M. 310 
Fig. 2— Cynomys gunnisonii, Baird.—White-tailed prairie dog.—Cooachatope Pass.... 335 
PLATE V. (41st and 47th parallels.) 
Fig. 1 —Dipodomys ordii, Woodh.—Kangaroo rat.—Rio Grande valley. 410 
Fig. 2— Tamias townsendii, cooperi. —Puget’s Sound. 301 
PLATE VI. (41st parallel.) 
Fig.— Sciurus fremontii, Towns.—Fremont’s squirrel.—Rocky Mountains. 27 
PLATE VII. (47th parallel.) 
Fig.— Sciurus douglassii var. suckleyi. —Steilacoom.—Variety with the hair on the 
under parts annulated. 275 
PLATE VIII. (35th parallel.) 
Fig. 1— Hesperomys texanus, Woodh.—Texas mouse.—Pecos river. 464 
Fig. 2— Perognatus jlavus, Baird.—Fort Union, Neb.. 423 
Fig. 3— Hesperomys boylii, Baird.—Middle fork American river. 471 
*The following list of illustrations embraces all that have been prepared for the present volume, as well as those intended to 
accompany the special reports of the different railroad parties. The plates of the latter series bear on tlieir upper border the 
official name of their respective surveys, as mentioned also in brackets after the number of the plate in the list, and it is to the 
reports of the parties thus indicated that reference is to be made for any figures not found in this volume. The names of the 
officers in'command of the different lines of survey are as follows : 
47th Parallel. —Governor I. I. Stevens in command. Zoologists, Dr. George Suckley, U. S. A., and J. G. Cooper, M. D. 
38th, 39th, 41st Parallel.— Captain J. W. Gunnison first in command, succeeded by Captain E. G. Beckwith. Zoologists 
Mr. Kreutzfeldt and Mr. Snyder. 
35th Parallel. —Captain A. W. Whipple in command. Zoologists, C. B. R. Kennerly, M. D., and H. B Mollhausen. 
32d Parallel. —Captain J. Pope in command. 
California. —Lieutenant R. S. Williamson in command. Zoologist, A. L. Heermann, M. D. 
California and Oregon. —Lieutenant R. S. Williamson in command. Report presented by Lieutenant H. L. Abbot. 
Zoologists, E. Sterling, M. D., and J. S. Newberry, M. D. Report prepared b). the latter. 
Additional references to the expeditions under which the collections described were made, will be found in the introductory 
remarks at the beginning of the volume. 
The numbers placed after the specific names are the catalogue numbers of the particular specimen, which constitutes the 
uriginal of the figure. 
93 L 
