KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 58. N:0 2. 105 



black, the dominating colour being white, produced by 9 — 10 cm. long hairs among which 

 are scattered a number of 15 — 19 cm. long black bristle-like hairs. On the lower flanks 

 are also to be seen some few buffish bristle-hairs which perhaps are a reminiscence of a 

 previous more juvenile dress. The feet, legs and parts of the shoulders and hams are 

 black. The lower side is chiefly black with some whitish bristles mixed in. 



This colour pattern must be regarded as the definitive one of the adult animal as 

 the young pigs of the genus always use to be more or less rufous. Consequently this 

 Bushpig is very different from the true intermedius, which hashe back and the sides påle 

 rufous, and from the races of choeropotamus it differs by its white -margined and partly 

 white-tufted ear. On the whole it may be said, that it is still more a connecting link to the 

 choeropotamus-series than the typical intermedius itself. 



The measurements of the skull of the young Potamochcerus intermedius arrhenii are 

 as follows: 



Occiput to tip of nasals 310 mm. 



Width of parietal flat area 38 » 



Greatest width at lambdoid crest 77 » 



Zygomatic width 138,5 » 



Width across postorbital processes 96 » 



Least interorbital width 67,8 » 



Orbit to anterior end of naso-premaxillary suture 164,5 » 



Of these measurements the great parietal width in such a comparatively young 

 animal is especially striking. This is the more the case because Schouteden 1 has found 

 the same dimension in the true Potamochcerus intermedius Lönnb. to be rather narrow 

 viz. 17 mm. even in the adult. This fact appears to pro ve the distinctness of P. i. arr- 

 henii. 



The relation of this specimen to the old boar skull is on the other hand somewhat 

 doubtful. 



The measurements of the adult Potamochcerus skull in Capt. Arrhenius's collec- 

 tion are as follows: 



Upper mesial length from oceipital crest to tip 



of nasals 383 mm. 



Least width of parietal flat area 41 



Greatest width of lambdoid crest 92,5 



From tip of postorbital process to lambdoid crest 97,8 



Zygomatic width 181 



Width across postorbital processes 103 



Least interorbital width 75 » 



Orbit to front end of naso-premaxillary suture . 220 » 



Hind surface of m 3 to tip of premaxillary . . 236 » 



Length of m 3 35,5 » 



Greatest width of m 3 23,6 » 



The dimensions recorded above indicate evidently a very large animal with a com- 

 paratively broad parietal region. In both these respects it resembles P. choeropotamus 



1 Revue Zool. Africaine, Vol. II, p. 140. 



K. Sv. Vet. Akad. Handl. Band 58. N:o 2. 14 



