482 



MB. OLDriELD THOMAS OjST THE 



[Nov. 19, 



time it was thought that the anterior horns of BramatJierium 

 corresponded to the posterior pair of Sivatherium, more recently ^ 

 both Lydekker and Forsyth Major have held that the anterior 

 horns of these two were homologous with each other, and corre- 

 sponded to the main pair of Giraffa, no homologue being supposed 

 to exist for the posterior pair. Now the present discovery fills 

 this lacuna, and finds a pair of horns in Giraffa which may be 

 homologized with the posterior horns of the fossil general 



Text-fig. 48. 



BramatJierium perimense. Diagrammatic back view of the skull. 



Moreover, in Samotlierium also, although the type skull ^ is im- 

 perfect in that region, a photograph of the posterior cranium of 

 another male, kindly communicated to me by Dr. Major, shows a 

 general projection exactly in the required position, and one 



1 Lyd. Pal. Ind. (10) ii. p. 130 (1883) ; Maj. P. Z. S. 1891, p. 322. 



^ At the best, however, the homologies of tlie horns of Sivatherium must 

 remain i-ather doubtful, aud an alternative arrangement might be that ils small 

 anterior horns should correspond to the fore, the long pair to the main horns, 

 and either there be no homologue to the mizen, or the small posterior tine on 

 the base of the long antler should correspond to it. 



^ In this type skull, as is shown in the original figure (P. Z. S. 1891, p. 318), 

 there is also a small and liitherto unnoticed lateral projection anterior to the 



