1897.] 



SPECIES OF POTAMOCHCERTJS. 



369 



Museum — show that whilst approaching P. porcus in the strong 

 but low apophyses above the canine, and in the breadth of the 

 upper cranial region anterior to the postorbital processes, it is 

 very remarkable and distinct from that of all the other species of 

 Potamochoerus in the elongation of the hinder part of the skull 

 backwards from the postorbital processes of the frontals. 



Skull of Potamochoerus hassama, (^ , from Abyssinia (seen from above). 



To resume, we have the following species and varieties of the 

 African genus Potamochoerus : — 



1. Potamochoerus larvatus (F. Cuv.). Madagascar. 



2. Potamochoerus choeropotamus (Desmoul,). S. and S.E. Africa. 



P. choeropotamus nyasce. Nyasaland (B. 0, A.). 

 P. choeropotamus dcemonis. Kiliraa-njaro. 



3. Potamochoerus johnstoni, sp. n. N.W. Nyasaland. 



4. Potamochoerus hassama (Heuglin). Abyssinia. 



6. Potamochoerus porcus (L.). West Africa, from Angola to Sene- 

 gambia and eastwards to Monbuttu (teste Schweinfurth and 

 Emin), 



