180 



BULLETIN 56, UNITED STATES NATIONAL MUSEUM. 



covered with velvet. Still another adult male (Xo. 58862, U.S.N.M.), 

 killed November 18, had perfect horns, from which the velvet had 

 entirely disappeared. 



Dental characters. — The teeth of the incisor-canine series, liia; 

 those of Odocoileus texamis and other white-tailed deer are small 

 and narrow compared to those of the black-tailed and -mule deer. 

 (Fig. 15.) 



Fig. 14.— Odocoileus codesi. Antlees op adult. (Cat. No. 59230, U.S.N.M.) 



Replacc7nciit of tlie milh teeth. — The mandibular incisors are the 

 first to be replaced. The permanent canines and incisors — found 

 only in the under jaw — are perfected by the time the last molar has 

 risen to its place and before any milk molar has been shed. A male 

 (No. 35750, U.S.N.M.), about a year old, killed July 1.5, with its 



Fig. 15.— Odocoileus couesi, Teeth of adult females, u, iNcisoE-CANtNE series viewed from iif 

 front; b, crowns of right upper molars; c, outer lateral view of right upper molars. 



mother," had acquired the first (inner) permanent incisors, the sec- 

 ond being plainly visible, carrying the corresponding millv tooth on 

 its summit. Its growing horns, in velvet, were 51 nnn. in length. 

 The last lower molar is just rising above the ah-eolar socket, and the 

 hindermost upper molar is just breaking through its bony capsule. 



"The iiiotlier (Xii. l'l\\l, T'.S.X.^Nf) contiiincil twci fetuses, iiboiit to lie born, 

 oneol" wliicli (Nu. 20558, U.S.N.M) was ])V(.'sorvecT. 



