ANTLER-GROWTH IN THE CERVID^. 



775 



of an antler of Pere David's deer and of an American deer, allied 

 to the Virginian, proves that the homologue of the brow-tine of 

 the Elaphine stage is present in both — a conclusion which is by 

 no means evident from an examination of the fully-formed 

 antlers. 



Antler-Growth in tyjnccd Old-World Deer. 



In the Zoological Gardens I have repeatedly watched, year 

 after year, the growth of the antlers of deer belonging to the 

 Elaphine, Sikine, and Rusine types without finding any variation 



Text-fia. 108. 



D 



Earlj' growth-stages of Antlers of some Old- World Deer. 



A & B. Successive stages observed m Cervus hancjlu. C. Cervus canadensis. 

 D. Stisa aristotelis. 



a, the anterior branch or " brow-tine " ; p, the posterior branch or " beam " ; 

 h, the rudiment of the bez-tine arising from the posterior branch. 



of moment in the method of their development. The antler 

 starts as an undivided bud. This bud then shows signs of 

 division into two buds, an anterior and a posterior. These*buds 



52* 



