180 



BULLETIN 5G, UNITED STATES NATIONAL MUSEUM. 



coA^ered with velvet. Still another adult male (No. 588()2, U.S.N.M.), 

 killed November 18, had perfect horns, from Avhich the A'elvet had 

 entirely disappeared. 



Doddl characters. — The teeth of the incisor-canine series, liice 

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

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

 (Fig. 15.) 



Fig. 14.— Odocoileus couesi. Antler.s of adplt. (Cat. No. 5'J230, U.S.N.M.) 



Replacement of the milk' 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 lime 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 15, with its 



Fig. 1.5.— Odocoilei'.s couesi, Teeth of adult females, a, Incisor-canine .series viewed from w 

 front; b, CROWNS of right upper .molars; e, outer lateral view of right upper molars. 



mother," had acquired the hrst (inner) ijerinanent incisors, the sec- 

 ond being plainly visible, carrying the corresponding mUk tooth on 

 its summit. Its growing horns, in velvet, wei'e 51 mm. in length. 

 The last lower molar is just rising .above the alveolar socket, and the 

 hindei'iHost u[)per molar is just breaking through its bony capsule. 



"The mother (No. I^^f^^f, U.S.N.^ND contained two fetuses, about to lie horn, 

 one of which (No. 205.58. IT.S.N.M) was picsei'ved. 



