216 



DR. H. GADOW ON THE EVOLUTION 



[Mar. 18, 



These stages are repeated by every young Cervine male. 

 A portion of the integument is frayed off, at first perhaps acciden- 

 tally, then repeatedly during the annual rutting-time, and a 



Text-fig. 25. 



Frontal Boije 



J' 



JSr' 



III Cartilage "\*CQrhlttge 4 later oabone.i e Os Coma ■. FroiUal toae 

 Evolution of Horns and Antlers. 



I. Frotoeeras. 

 II. Young Stag, with velvet. 

 II a. Sivatherium. 

 lib. Giraffe. 

 II c. Okapi. 



nil. Antilocapra, adult ; early stage. 

 III^- )> „ ; later stage, 



when the prong begins to 



grow. 

 IV. Domestic Calf. 



rhythm of regeneration is established. The regeneration naturally 

 concerns chiefly the additional chondro-osseous apical portion, this 

 being the distal and therefore more easily injuied part. But 



