28,6 



29 



79 ■ 



85 



33 



'-1 



57,5 54 



78 



74 



n 



8o 



59 



i6o 



277 



Least breadth of palate between anterior pre- 



molars 



Length of nasals mesially 



Greatest breadth of nasals 



Distance froni middle of brim of alvéole of 



anterior molar to sutura nasalis 



Distance frora middle of brim of alvéole of m^ 



to sutura nasalis 



Length of upper molar séries 



Distance from orbit to tip of premaxillary . . 

 Length of horns in a straight line from base 



to tip 329 340 



Greatest spread measured on the inner side of 



the horns 200 209 



Distance from tip to tip 182 214 



From this is évident that the différence with regard to the basi- 

 cranial length of the skuU is larger between the Katanga race 

 (about 240 mm.) and the Nyassa race (255 mm. according to 

 Thomas) than between the latter and the tvpical race (260 mm. 

 according to Thomas). The greatest breadth of the skull, and the 

 interorbital breadth is also smaller in the Katanga race than in the 

 Nyassa race, but with regard to the breadth of the muzzle the 

 former is somewhat larger than the latter. The constriction of 

 the skull in front of the orbits is not so pronounced in the Katanga 

 race as in the Nvassa race. As ThoMx^s has not communicated anv 

 more measurements of the skull of yjE. in. johnstoni the présent 

 comparison cannot be extended any further with regard to such. 

 The horns of the Katanga Impala are as short as those of the one 

 from Nvassaland, but the spread of the former (about 200 mm.) is 

 still less than that of the latter (250 mm.). Both agrée, however, 

 therein that the distance between the inner side of the horns at 

 their greatest spread is equal to the distance between the tips. 



Although there is no doubt concerning the affinity between the 

 Impala of Nyassaland and that of Katanga, I think the différence 

 in dimensions is so great that a subspecific name must be created 

 for the latter which appears to be the smallest known race of 

 Impala. 



19 



