102 



EINAR LÖNNBERG, MAMMALS COLLECTED IN CENTRAL AFRICA. 



lower edge of the otherwise hairy lip, a conditiön wliich is to be found very typically in 

 t lic Elk, but in various degrees also in other Ruminants. Finally, if before the closing 

 of the cleft in the lip, the mucous tissue has grown out över the anterior edges to such 

 a degree that a considerable portion of the same has been left outside the line of con- 

 crescencc, a large bare and moist muff le is formed, as in its fullest development it is found 

 in Bos, but also in many other Ruminants. 



Phacochcerus africanus centralis n. subsp, 



The material of Warthogs in the present collection consists of and old female killed 

 at Lake Albert Edward the 20th Dec. 1913, an old male probable from the same locality, 

 and two boar-skulls and a skull of a sow. 



The most striking feature of these Warthog skulls is their considerable size. In 

 this rcspect they are not superseded by any Phacochoerus skull examined by the present 

 author except by a skull of Ph. africanus from Cape Verd in Brit. Mus. Nat. Hist. 1 With 

 regard to several details they display a certain individual variation which appears to 

 be a rather common occurrence among Warthogs, but in general appearance and in relative 

 dimensions they agree well enough as the measurements recorded below pro ve. Their 

 racial identity ought accordingly not to be subjected to any doubt. 



Four to six lower incisors are retained in all skulls, even in the oldest, and two upper. 



Occiput to tip of nasals .... 433,5 mm. 



Least width of parietal flat area . 58 » (13,3%) 



Length of postorbital portion of 



skull 48,7 » (11,1%) 



Greatest breadth of skull .... 245 » 

 Interorbital width at middle of or- 



bit above 142 



Least interorl)ital width .... 140 



From orbit to tip of nasals . . . 343,5 



Basal length of skull 329 



Palatal length to end of premaxil- 



laries | 241 



A 

 old 2 a* 



(32,7 %) 



(79,2 %) 



B 



ad. 3 rf 



C 

 old' o* 



D 



old 9 



419 mm. 



58,8 » (14,2%) 



56,6 » (13,5%) 



238 » 



137 » (32,6%) 



135,6 » 



328 » (78,2 %) 



321 » 



230 » 



417 mm. 



46,4 » (11,1%) 



50 » (11,9%) 



231 » 



132,3 » (31,6%) 



131 » 



327,5 » (78,3%) 



321 



233 » 



379,5 mm. 



38 » 



49 » 



193,5 » 



118,5 » 



116,5 » 



296 » 



307 » 



217 » 



E 



ad. 9 



373,3 mm. 



23 » 



39 » 



199 » 



120 » 



118 » 



300 >» 



294 » 



211 » 



From the above measurements it may be found that the Warthog skulls of this 

 collection nearly agree with Ph. africanus with regard to length. The postorbital portion 

 of the skull is comparatively long varying from ll,i to 14,2 % of the upper length of the 

 skull. The breadth of the parietal flat area varies almost in a similar degree, or from 

 ll,i to 13,5 % of the upper length of the skull. These percentages are rather similar to 



1 Cf. Lönnberg, Proc. Zool. Soc. London, 1D08, p. 936. 

 - Only last upper mohi.r in use. 

 3 Two upper molars in use. 





