18 



THE ANTELOPE OF AMERICA. 



Second. Those which have solid horns, or more properly, 

 antlers, which are osseous in their structure and are provided 

 with a periosteum. 



Still we find such important differences among those which 

 compose each of these divisions, that we are not satisfied till we 

 further subdivide them into classes : the first division of this 

 group into 



1. Those which have hollow and persistent horns ; and 



2. Those which have hollow and deciduous horns. 



All the hollow horned ruminants have persistent horns, and so 

 are of the first class ; except the American antelope (^Antilocapra 

 Americmid) which has a hollow horn, which is shed and repro- 

 duced annually, and so is the sole representative of the second 

 class. Then, again, those which have solid horns or antlers also 

 require a further classification : — 



1. Those which have solid and deciduous antlers, which em- 

 braces all the solid horned ruminants except 



2. The giraffe, or camelopard, which alone has a persistent 

 solid horn. 



EIGHTH ORDER. 



Skcond Group of 

 THE Eighth Okdek, 



First Group of the Eighth Okdek. 



Second Division of the First 

 Group of the Eighth Order. 



First Division of the First Group 

 of the Eighth Order. 



Second Class ofiThe First Class Second Class of 



the Second Di- 

 vision of the 

 First Group of^ 

 the Eighth Or- 

 der. 



of the Second 

 Division of the 

 First Group of 

 the Eighth Or- 

 der. 



the First Di 

 vision of the 

 First Group of 

 the Eighth Or- 

 der. 



First Class of the 

 First Division 

 of the First 

 Group of the 

 Eigluli Order. 



si 



- 3 





\^ 



w 



2. 

 3' 

 a- 



• -s.td 



o f= 

 - W 



^■r~ 



-^Y~ 



If, however, we look to the feet as a means of classifying the 

 ruminants, we should be obliged to make important changes in 



