20 ARKIV FÖR ZOOLOGI. BAND 10. N:0 12. 



finely grizzled with white». The general colour is produced 

 by light fawn-coloured or buffish subterminal rings to the 

 otherwise blackish brown visible parts of the hair. If the 

 dark thin tips are worn off, and the pelage bleached the 

 general colour is, of course, paler. The under fur is some- 

 what variable. It is more or less dark slaty grey at the 

 base, then comes a lighter zone passing from whitish to 

 brownish. The sides are lighter than the back because the 

 rinors to the hairs are there whitish and more dominant. 

 The lower side is white. There is in all the specimens a 

 quite distinct whitish spöt above the eye. 



I have described the colour of these specimens to facili- 

 tate comparison with others, because it appears to be not 

 quite clear into how many geographical races P. brucei may 

 be subdivided. 



For the same purpose the following cranial measurements 

 are annotated: 



ef stage VIII 



Greatest length 87,5 mm. 



Condylo-ineisive length 82,6 » 



Basal length 77,5 » 



Tip of nasals to occiput 84,4 » 



Zygomatic breadth 49 » 



Mesial length of nasals ........ 20 » 



» » » frontals 32,5 » 



Tip to tip of postorbital processes . . . 38,3 » 



Breadth across outside of m^ 26,8 » 



Diastema 11 » 



Length of upper molar series 30 » 



Breadth of m^ 6 » 



The parieto-interparietal suture is, of course, obliterated 

 already in the youngest of the specimens. 



In the oldest specimen there is »a pair of protuberances 

 on the posterior margin of the palate» as Wroughton has 

 described in P. brucei hindei, but these protuberances, al- 

 though raised above the palate-floor, do not extend beyond 

 the posterior margin of the palate. In the younger speci- 

 men they are entirely absent. They represen t, of course, 

 insertion-points for muscles and may probably be very va- 

 riable individually. The cranial measurements of P. b, hindei 

 as quoted by Wroughton for an old female (stage VIII) are 

 smaller than those above. 



