EXPLANATION OF THE PLATES. 751 



Page. 



Fig. 13 Cervus virginianus, Bodd. Deer. No. 3062. Essex county, New York 648 



Eight horn from inside. Size 4.16 inches to the inch of the figure. 



Fig. 14 f Cervus leucurus, Dougl. White-tailed deer. No. 2920. Yellowstone river 651 

 Eight horn from inside. Size, 3.68 inches to the inch of the figure. 



Fig. 15 f Cervus leucurus, Dougl. No. 658. Upper Missouri 658 



Left horn from inside. Size, 5.04 inches to the inch of the figure. This 

 horn is remarkable for the amount ef flattening and consequent elongation, 

 antero-posteriorly, of the cross section at any point. 



Fig. 16 f Cervus leucurus, Dougl. No. 2928. White Earth river, Nebraska 651 



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- 

 rotis, but is labelled by Lieut. Warren C. Virginianus , and most probably 

 is the white-tail deer of the Upper Missouri. 



Fig. 1*7 Cervus leucurus, Dougl. No. 3203. Whidby's island, Puget's Sound 651 



The true C. leucurus of Douglass. Eight horn from inside. Size, 5.09 

 inches to the inch of the figure. 



Fig. 18 ? Cervus leucurus, Dougl. No. 829 Big Sioux, Nebraska 652 



Head from before, showing the remarkable development of snags. Size, 

 6.20 inches to the inch of the figure. 



Fig. 19 Cervus macrotis, Say. Mule deer. No. 831. Big Sioux, Nebraska 657 



Eight horn from inside. Size, 8.23 inches to the inch of the figure. 



Fig. 20 Cervus macrotis, Say. No. 2918. Yellowstone 657 



Eight horn from inside. Size, 5 inches to the inch of the figure. 



Fig. 21 Cervus columbianus, Eich. Black-tailed deer. No. 1618. Monterey, Cal... 660 

 Eight horn from inside. Size, 8.30 inches to the inch of the figure. 



Fig. 22 Cervus columbianus, Eich. No. 3204. Puget's Sound 660 



Eight 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. 



Fig. 23 Antilocapra americana, Ord. Prong-horned antelope 668 



End of muzzle, [as viewed from above and in front, (taken from a well 

 mounted head Fig. 24. Under surface of left front hoof. 



Fig. 24. Ovis montana, Cuv. Bighorn 674 



Male. End of muzzle, as viewed from above and in front, (taken from the 

 mounted specimens brought by Captain Stansbury.) 



Fig. 25 Under surface of left front hoof. 674 



Fig. 26 Ovis montana, Cuv. Bighorn. Upper Missouri 675 



Male. Left horn from the left side. 



Fig. 27 The same, from the front 675 



Fig. 28 Base of the horn 675 



Scale, 4 inches to the inch of the figure. 



Fig. 29 Ovis montana, Cuv. No. 2593. Bridger's Pass 676 



Female. Left horn from the left side. Size, 3.42 inches to the inch of the 

 figure. 



