196 



MR. R. I. POCOCK ON THE EXTERNAL 



the complete absence of the antlers and the presence of long 

 tixsk-like canines in the male. Capreolus, on the other hand, has 

 well-developed branched antlers, and has normally lost all trace of 

 the canine, being in the latter particular more specialised than 

 Cervns. Again, Capreolus has lost the preorbital and retained the 

 metatarsal gland. Hydropotes .\\&.s retained the preorbital and 

 lost the metatai^sal gland ; and has acquired inguinal glands, a 

 new feature in the Cervidse. The diflferences between the two in 

 the length and separability of the hoofs are also marked ; but, 

 considering the diiferences of habitat, they are not obviously an 

 indication of i-emoteness in kinship. The deep and long inter- 

 digital glandular depressions in Hydropotes, on the contrary, are 



Text-figure 11. 



Vft'iii 



A. Inguinal and genital area of St/dropotes inermis $, showing the neai-ly 



naked area of skin on each side, with a single pair of teats and the shallow 

 pouches of the inguinal glands. The sheath of the glans penis cut open 

 along the middle line, showing the glans turned towards the right and the 

 two ridges forming the groove along which it runs. 



B. Anal area of the same with the tail raised, showing the anus insunk in the 



surrounding glandular area. 



much more primitive than the pouch-like gland of the hind foot 

 of Cervul'us. 



In view of the peculiarities of Uydropotes, I propose to separate 

 the genus from the rest of the Oervid?e as the type of a special 

 subfamily, Hydropotinse. 



Genus Odocoilbus {zizDorcelaphus). 

 Odocoileus virqinianus Bodd. (p. 962). 



In 1910 I had seen no fresh example of this species, quoted as 

 Borcelaphus americaniis, and was only able to describe tlie glands 

 in the feet, as shown by specimens in the Museum of the College 



