1897.] SPECIES OF P0TAM0CH(EET7S. 367 



any collector or traveller in this part of British Central Africa, and 

 farther north, too, in Ugogo, Burton met with only red wild boars. 

 Now it is well known that A. Smith ', speaking of the Bosch Vark, 

 says that " scarcely any two specimens of this species exhibit the 

 same colours — some are a brownish black variegated with white, 

 and others are almost entirely of a light reddish-brown or rufous 

 tint without the white markings : indeed such are the varieties 

 that it is scarcely possible to say what are the most prevailing 

 colours." As Smith includes the Malagasy Wild Hog under 

 the same name {Sus larvatus), it cannot be made out how far his 

 remarks apply to the South-African form alone. 



I propose to distiuguish these Nyasa Bush-Pigs, with one 

 exception, to be mentioned later on, as Potamochoerus chcerojiotamus 

 nyasce (see PL XXV. fig. 4 and PI. XXVI. fig. 4). 



Trom Kilima-njaro, the Natural History Museum has a skin, with 

 incomplete skull (lower jaw wanting) (see PL XXV. fig. 1 and 

 PL XXVI. fig. 3), of a small form of Potanwchoerus (female), ob- 

 tained by the Rev. W. Morris. The skin is covered with long and 

 very dark brownish-black bristles. The skull somewhat approaches 

 female skulls of P.jjorcus, and the last upper molar is short as in 

 the latter species ; but the posterior nasal region is flattened, as in 

 P. cliceropotamus, with which last feature agrees as well the more 

 complicated pattern of the molars. Before pronouncing definitely 

 on this interesting form, I should welcome the opportunity of 

 examining an adult male ; in the meantime I propose to call it 

 Potamochoerus cliceropotamus clcemonis ^. 



3. PoTAMocH(ERUs JOHJfSTONi, sp. H. (Plate XXV. fig. 3 and 

 Plate XXVI. fig. 1.) 



This is a new form from the Ngarawi Eiver, Nkanga, " in the 

 North Nyasa District (N.W. Nyasaland)," based on the skull of a 

 female presented to the Nat. Hist. Museum by Sir Harry Johnston. 



The skuUs of the females of the various species of Potamochoerus, 

 as a rule, closely resemble each other ; this particular one having 

 characters of its own, it may be anticipated that the skuU of the 

 male and the rest of the animal will present still greater differences. 

 The skuU is remarkable for its large size (the animal was scarcely 

 adult), the straight upper contour, and its slenderness. The whole 

 of the nasal region is not at all flattened and with angular borders 

 as in the other species, but rounded off. Molars and premolars 

 large. Premolars |-. 



Sir Harry Johnston, to whom Mr. De Winton ^^'rote in my name 

 for further information, kindly informs us that he brought this 

 skull home be!:;ause, when he first saw the head in his bo/s pos- 



1 A. Smith. African Zoology (The South- African Quarterly Jouraal, voL ii. 

 p. 178, 1834). 



^ "Kilima" = mountain; " njaro," a demon, suppossd to produce eold 

 (H. H. Johnston). 



