EINAR LÖNNBERG, THE GENUS POTAMOCHCERUS. 



group as »lambo mena» (P. larvatus) to »lambo liova» (P. 1. 

 hova) on Madagascar. 



PotamocliOBrus liassama (Heuglin), shows evidently some 

 resemblance to the P. choeropoiamiis-gvou^ in its exteriör, to 

 judge from Heuglin's description in which it is stated^ that 



the ears and shoulders are black the bristles of the 



rump nearly a foot long etc. The 



upper side is otherwise said to be 



covered with »olivaceons to 



rusty brown long bristles which 



partly have black tips». Forsyth 



Major (1. c. 368, 369) has pub- 



lished two figures of photos of a 



skull of an adult boar from 



Abyssinia. From one of these 



it may be seen that the flat area 



of the parietal region is in the 



Abyssinian Bush Pig somewhat 



broader than the average of for 



instance P. ch. maschona from 



Mozambique and Rhodesia being 



about 7,3 7o of the upper mesial 



length of the skull, while in the 



latter it does not quite reach 



7%. This difference is, how- 



ever, too slight to be of any im- 



portance, but, as has been men- 



tioned above, more broad-headed 



Bush Pigs are to be found in the 



northern parts of German East 



Africa. The Abyssinian Bush Pigs 



are thus by those geographi- rig. 



cally separated from the members 



of the P. choerojjotamus — group 



which have dimensions of the parietal region similar with 



its own. 



Major has drawn attention to the »elongation of the 

 hinder part of the skull backwards from the postorbital pro- 

 cesses of the frontals» in P. hassama. I have not had any 



^ Verb. d. Kaiserl. Leop. Carol. Akad. d. Natmf. Bd XXX. Dresden 

 1864. Beitr. zur Zool. Afr. — Nachtrag p. 7—9. 



5. Upper view of the same 

 skull as fies. 3 and 4. 



