608 



Subgenus Aigoceros. 



(Horns in both sexes, annulated, with a simple curve, the points directed backwards ; no lacrymal 

 pits ; no inguinal follicles ; large interdigital follicles ; four teats.) 



3696. The skeleton of the Roan or Equine Antelope (Antilope equina}. 



This is one of the largest species of the genus ; and, as the weight of the body is increased, 

 the disproportionate length of the metacarpus and metatarsus is diminished. The vertebral 

 formula is : 7 cervical, 14 dorsal, 6 lumbar, 4 sacral, and 14 caudal. The atlas and dentata 

 send out strong diapophyses : from that of the third cervical a broad pleurapophysial ridge 

 extends forwards and underlaps the diapophysis of the axis : a similar structure is presented 

 by the fourth and fifth cervicals, and in the sixth the pleurapophysis forms a broad sub- 

 quadrate plate extending downwards and a little outwards. This element is absent in the 

 transverse process of the seventh vertebra, which is imperforate. The dorsal spines begin 

 progressively to shorten from the fifth ; that of the thirteenth is vertical, and indicates the 

 centre of motion of the trunk. A metapophysis is developed from the front of the diapophysis 

 of the second to the ninth dorsal vertebrae inclusive, where it begins to be transferred to the 

 anterior zygapophysis from which it extends in the last four dorsals and in all the lumbar 

 vertebrae. There is a short anapophysis in the last two dorsals, but not in any of the lumbar 

 vertebrae. The serial homology of the transverse processes of the lumbar vertebrae with the 

 diapophyses of the dorsals, and not with the metapophyses, is very plainly shown in this 

 skeleton. Nine pairs of ribs directly join the sternum, which consists of eight bones and the 

 xiphoid cartilage. 



Purchased. 



3697. The calvarium and horns of the Sable Antelope (Antilope niger). 



From South Africa. 



Presented by J. Adamson, D.D. 



Subgenus Lyroceros. 



(Horns annulated and lyrated, the points directed forwards ; no lacrymal pits ; no inguinal follicles ; 

 large interdigital follicles ; four teats.) 



3698. The skull, with the dried skin of the head and horns, of the Waterbok (Anti- 

 lope ellipsiprymna). Purchased. 



3699. The horns of the Harnessed Antelope (Antilope scripta). Purchased. 



