36 



ARKIV FÖR ZOOLOGI. BAND 7. N:0 (). 



In the upper jaw all four premolars on either side re- 

 main. In the lower jaw, however, only p^ and p^ are left. 

 The teeth are small (fig. 5). The length of jt' and p^ is simi- 

 lar viz. 12 mm., m^ is 15 mm., m- 21 mm. and iir 30 mm. 

 With regard to the narrow parietal area P. larvatus re- 



sembles to some degree P. ch. 

 nyasoe and P. ch. dcemonis, but 

 if the skull of the Malagasy 

 »lambo mena» is compared 

 with that of the Kyasa Bush 

 Pig it looks quite like a pigmy. 

 The Kilimanjaro Bush Pig is 

 to jndge from the skull not 

 so big as the Nyasa Bush Pig, 

 but it seems nevertheless lar- 

 ger in every respect than the 

 present specimen of P. larva- 

 tus as the table of measure- 

 ments (II) proves. 



The width of the parietal 

 area of a male Bush Pig 

 belonging to a broad-headed 

 race increases with age. A 

 narrow parietal area may t hus 

 to some extent be regarded as 

 a juvenile characteristic. The 

 young pigs of dark races are 

 as a rule more reddish in co- 

 lour than the adult. P. lar- 

 vatus represents thus with re- 

 ^^ Z*^ , . ,7 11, gärd to both these characteri- 



Fig. 4. Palatal view ot the same skull ^ . ., . 



as fig. 3. stics a more juvenile or pri- 



mitive stage than the broad- 

 headed and dark P. L hova which has reached a higher stage 

 of specialisation. 



It is also of interest to note that the »rufous Bush Pig 

 of the Nyasa land» P. ch. nyasm with its narrow parietal re- 

 gion (although it is not at all dwarfed) stånds with regard 

 to these two characteristics in an analogous relation to the 

 darker and more broad-headed races of the P. rhmropotamus- 



