128 



ON ANTILOCAPRA AMERICANA. 



published in the * American Naturalist ' (xii. 1878, p. 557) by a Mr. 

 E. W. Endlich : 'After several years' familiarity with the Prong-horned 

 Antelope in a wild state, I may say I have never met with an undoubted 

 case of shedding of the horn-sheath. Shed horn-sheaths are not common 



Fig. 1. 



P. Z. S. 1880, 

 p. 541. 



Head of Prongbuck, showing the new pair of horns the clay after the 

 shedding of the old ones : reduced. 



where these animals abound, as they would be were the phenomenon 

 usual. Their appearance on the animal at times indicate that they may 

 be shed ; and I suppose the evidence is sufficient that the shedding 

 occurs. But it is not periodical, or even frequent. 1 



" Fortunately, we have not had long to wait before being able to again 

 test the accuracy of Mr. Bartlett's original position. 



" On December 4, the Society purchased a pair of Pronghorns, the 

 male of which was nearly or quite adult, and had ' apparently lately shed 

 his horns, as the pair which he bears were quite soft when he arrived ' 

 (c/. P. Z. S. 1880, p. 23). In confirmation of this, Mr. Bartlett tells me 

 that his horns also had then no trace of the ' prong,' which subsequently 



