EINAR LÖNNRERG, THE GENUS POTAMOCHrERUS. 21 



Portug. East Africa and adjoining parts of Rhodesia thns 

 P. ek. rnaschona. 



A female from Coguno, Inliambane (BM. 6. 11. 8. 13. 5) 

 has the colour of the back rufous brown mixed with black. 

 The thick crest is black with white tips to a part of thebristles. 

 The forehead between the eyes and the ears is brown mixed 

 with black in the middle, and yellowish grey laterally. The 

 broad black band round the snout is AveJI defined by grey 

 or brownish grey as well in front as behind. The whiskers 

 are white with black above and beneath. The black patch 

 below the eyes as usual separated from it by a narrow white 

 band. The ears, shoulders, legs, feet, and the whole of the 

 under side from the chin to the anus are black. 



A female collected by Neaves in Rhodesia is stiil darker 

 without any rufoiis on the back. The greater part of the 

 body is black with the following exceptions. From behind 

 the shoulders dirty yellowish hair are mixed among the black 

 of the back and they become more numerous on the rump. 

 The richly developed dorsal crest is strongly white-tipped, 

 especially above the shoulders. The ears are, of course, black 

 but the forehead is mixed brown, black and whitish. The 

 broad black band across the snout is bordered by grey behind, 

 and whitish in front. The whiskers are long, white in a 

 black area. 



A specimen of P. choeropotamus maschona a male from 

 N. E. Rhodesia belonging to Mr. R. Ward has a påle grey 

 face with a broad dark band round the snout in front of the 

 warts, blackish round the eye, whitish whiskers but the 

 cheeks are dark on both sides of them, black ears, black 

 dorsal crest with white tips, back with mixed black and 

 rufous hairs, feet and lower parts black. 



To judge from these specimens the narrow-headed, some- 

 what more northern River Högs are just as dark as the 

 broad-headed ones of Cape and Natal. There is thus not 

 possible to state any differences in outer appearance, and 

 the difference, if it is constant, should thus only consist in 

 cranial characteristics which makes the question still more 

 difficult to solve w4th full certainty. 



From German East Africa as already mentioned I ha ve 

 not seen any skins. 



