The Wild Boar 523 



THE PIGS 



Genus Sus 



From the wart-hogs the species of the genus Sus differ, among other 

 features, by the smaller, narrower, and more pointed head, the absence of 

 the large conical warts on the face, the relatively smaller upper tusks, 

 which are coated all oyer with enamel, and also by the simpler structure and 

 lower crown of the last molar in each jaw. They may be divided into true 

 pigs (sub-genus Sus) and bush-pigs (Chceropotamus), the former being widely 

 distributed in the Old World, while the latter are exclusively Ethiopian. 

 The bush-pigs have one pair of cheek-teeth less in each jaw than the true 

 pigs, the hinder cheek-teeth themselves are simpler, the tusks are smaller, 

 and on each side of the face is a pronounced swelling, due to the presence 

 of a ridge of bone over the sheath of the tusk. The African forms are as 

 follows, viz. : — 



A. True pigs (sub-genus Sus). 



1. Wild Boar (S. scrofa). 



2. Sennaar Boar (S. senaarensis). 



B. Bush-pigs (sub-genus Chceropotamus). 



3. Common Bush-pig (<?. chceropotamus'). 



4. Abyssinian ,, (S. „ hassama). 



5. W. African ,, {S. „ porcus). 



No. 3 is divided into three local races — 5. chceropotamus typicus, S. chcero- 

 potamus nyasce, and S. chceropotamus hassama. 



Algerian Wild Boar (Sus scrofa) 

 The Algerian wild boar is very like the wild boar of France, and 1 can 

 affirm that both are of exactly the same species, the slight differences 

 between them being due only to the difference in the climates of the two 

 countries. 



