— lyo — 



it can be seen. This broadening of the nasals stands evidently in 

 correspondence with a thickening of thèse bones, especiallv basallv, 

 at the same time as also the frontals are greatly thickened with 

 âge. This can also be observed by comparing thèse three skulls. 

 The female skull has a verv flat fore head, that of the vounger of 

 the maies (which is of the same âge as the female to judge from 

 the dentition) is alreadv considerably more convex in the inter- 

 orbital région. This is still more the case with the older maie. As 

 the posterior portion of the female skull is broken it can be stated 

 that its frontal bone is not thickened, but that this is the case with 

 the maies is clear enough. That this is an adaptation to counteract 

 the force of the attacking adversarv and avoid a fracture of the 

 skull, when the bucks are fighting, is évident. 



B Lusiimbi. » 1' Lusungu. » 



(J fully adult 9 ^'^"•* *"" 



with permanent (j* ad., mille molars not 



dentition same stage yet lallen 



but molars not as the out although ;«3 



much worn. female. shows usure. 



mm. mm. mm. 



Greatest length of skull 187.3 '8° — 



Condj'lobasal length 176.3 171 — 



Basai length 166.3 161.5 — 



Preorbital length i03-5 9^ 97 



(ireatest breadth 80 75.5 'j'è 



Breadth of brain case 57 56.5 56.3 



Interorbital breadth . . 47.5 44.5 44 



Length of nasals 83.5 75 72 



Greatest breadth of nasals 36.2 33.5 30 



Breadth of nasals at premaxillaries . . 19 17.8 17 



Breadth across anterior lobe of w'' . . 55.3 52 54 



Length of /;«//« 27.3 19.4 24 



Breadth of Iml.'a across middle . . . 17.4 10 14 



Length of uppev molar séries .... 53.5 50.7 55 



» molur- only .... 31.2 29.3 31 



Breadth of ;«', auterior lobe .... 12.5 11. 3 11. 4 



» m\ » .... 11.7 9.6 II 



Length of lower true molars .... 33.5 32.5 34 



