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EXPLANATION OF THE PLATES. 
18—Cervus virginianus, Bodd.—Deer.—No. 3062.—Essex county, New York..... 
Right horn from inside. Size 4.16 inches to the inch of the figure. 
14—? Cervus leucurus, Dougl].— White-tailed deer.—No. 2920.—Yellowstone river 
Right horn from inside. Size, 3.68 inches to the inch of the figure. 
15—? Cervus leucurus, Dougl.—No. 658.—Upper Missouri..........cssccssseceseceecees 
Left horn from inside. Size, 5.04 inches to the inch of the figure. This 
horn is remarkable for the amount of flattening and consequent elongation, 
antero-posteriorly, of the cross section at any point. 
16—? Cervus leucurus, Dougl.—No. 2928.—White Earth river, Nebraska.......... 
Both horns from the left. Size, 3.91 inches to the inch of the figure. This 
horn is much compressed antero-posteriorly, at its terminal or upper 
half, as in the moose or reindeer. It may possibly belong to a C. mac- 
rots, but is labelled by Lieut. Warren C. Virginianus, and most probably 
is the white-tail deer of the Upper Missouri. 
17—Cervus leucwrus, Dougl.—No. 3203.—Whidby’s island, Puget’s Sound........ 
The true C. leucwrus of Douglass. Right horn from inside. Size, 5.09 
inches to the inch of the figure. 
18—? Cervus leucurus, Dougl.—No. 829—Big Sioux, Nebraska.......cccseeccseccesece 
Head from before, showing the remarkable development of snags. Size, 
6.20 inches to the inch of the figure. 
19—Cervus macrotis, Say.—Mule deer.—No. 831.—Big Sioux, Nebraska............ 
Right horn from inside. Size, 8.23 inches to the inch of the figure. 
20—Cervus macrotis, Say.—No. 2918.—Yellowstone........ccsccsssssecceccnscceseecesees 
Right horn from inside. Size, 5 inches to the inch of the figure. 
21—Cervus columbianus, Rich.—Black-tailed deer.—No. 1618.—Monterey, Cal... 
Right horn from inside, Size, 8.30 inches to the inch of the figure. 
22—Cervus columbianus, Rich.—No. 3204.—Puget’s Sound..........ccceeee ceseeccceee 
Right horn from inside, showing the absence of fork on one side, as well as 
of basal snag. Size, 5.74 inches to the inch of the figure. 
23—Antilocapra americana, Ord.—Prong-horned antelope...........++ dooutede sosweeee 
End of muzzle, 'as viewed from above and in front, (taken from a well 
mounted head.) Fig. 24. Under surface of left front hoof. 
24 — Ovis montand, Covs—Bighornr. :.....c.cssccbsscdecedaccecencdecesvecdedececccaeccoaecece 
Male. End of muzzle, as viewed from above and in front, (taken from the 
mounted specimens brought by Captain Stansbury.) 
ao—Usider surface of lett ‘front hobf) i. .tiu eles hestiwal Waa dbs ev iecasccnce 
26—Ovis montana, Cuv.—Bighorn.—Upper Missouri.............ccacccsscccseeecceeecees 
Male. Left horn from the left side. 
Bi Phoeisame; from the fronts. ccsesonscvevs deavsacsecdesanseeeeeee ee Terre 
DB —ISHBO OL HO BOTW aa caccacns ssooaqdex cosdancue eden descr itudrs dover tte SeTa Mens. ccte 
Scale, 4 inches to the inch of the figure. 
29—Ovis montana, Cuv.—No. 2593.—Bridger’s Pass........ccsccc0 scseccseecescesceeecs 
Female. Left horn from the left side. Size, 3.42 inches to the inch of the 
figure. 
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