284 HYEACID^. 



They are so in a young skull so named in the British Museum ; but 

 the lobes are much less distinct and narrower than in skulls of the 

 half-grown and adult H. dorscdis in the same collection ; and the 

 lobes of H. capensis evidently wear away much sooner than in the 

 Tree-Hyraces or Dendrohyrax. 



The skulls named Hyi-ax capensis in the British Museum are 

 without skins, and therefore cannot be determined with certainty ; 

 they differ in the width of the forehead at the hinder edge of the 

 orbits being greater compared with the length of the skuU ; they 

 diifer considerably in the form of the flat space on the crown, even 

 the skulls of adult animals. 



No. 725 c (of Gerrard's Catalogue). The front of the crown is 

 triangular, uniting into a very narrow sagittal crest level with a Una 

 over the condyles ; the teeth are very large, and the palate wide. 



No. 724 h. Rather smaller and wider than 725 c, with the teeth 

 equally large and the palate wide ; but the crown is flat, wider in 

 front, becoming narrower and continued behind, and forming a 

 smooth space above. 



Nos. 724 c and d are smaller than either 725 c or 724 h. The 

 teeth are very large, the nose is narrower and more compressed ; 

 and they diifer from both the above in the crown being wider and 

 forming a broad band to the occipital crest. In 724 d the crown is 

 only slightly broader in front, and more nearly of the same width 

 throughout its length. In 724 c it is quite as broad behind as in 

 724 d, but much wider in front. 



The interparietal bones of these two skuUs are visible ; they are 

 nearly four-sided, and the width of the crown similar to, but not so 

 large as the interparietal bone figured by Blainville (Osteograph. t. 2) 

 as that of H. capensis. 



There is the skull of a young animal, with the milk cutting-teeth, 

 developing the second true molar, in the British Museum (724^), 

 that has the interparietal similar to those of 724 c and d, but con- 

 siderably larger, though the skull is smaller, like the figure refeiTed 

 to in De Blainville. 



The skeleton with a skull (724 e), in the British Museum, of a 

 young animal with milk cutting-teeth, has a subtriangular inter- 

 parietal, somewhat like that of H. Burtonii. 



"in the British Museum there is the skull and skeleton of a very 

 young animal, received from the Zoological Gardens (No. 724 h), 

 which is pecidiar in having a very broad, half-oblong interparietal 

 bone occupying the hinder edge of the crown, with only the narrow 

 upper edge of the occipital bone behind it. The front edge of the 

 interparietal is regularly rounded, and the hinder one straight. The 

 orbit is incomplete. De Blainville figiires a skuU of a young spe- 

 cimen (Osteog. t. 2) as H. capensis which somewhat resembles this 

 skull. This skull, in the form of the interparietal, agrees with the 

 nearly adult skull of Dendrohyrax dorscdis (No. 1142 c); but we 

 have a skuU of a very young animal of that genus in the Museum 

 Collection which has the orbit complete and the upper part of the 

 occipital bone dilated. This skuU is so distinct from any other in 



