Dr. J. E. Gray on the Species ©/"Hyrax. 41 



The skull in the British Museum (725 c) that agrees with 

 De Blainville's figure of the interparietal bone of H. syriacus 

 is rather larger and has the front upper premolar rather larger 

 than the skulls of H. capensis according with the same dis- 

 tinctive mark, viz. 724 h^ 724 c, and 724 c?, which were all 

 received from the Zoological Society without skins ; and the 

 hinder openings to the nostrils are more contracted in those 

 named H. capensis than in H. syriacus. 



De Blainville (Osteograpli. t. 2) figures the skull of the 

 very young Hyrax capensis as having all the four lower cut- 

 ting-teeth three-lobed. They are so in a yomig 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. 

 dorsalis 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 Hyrax capensis in the British Museum, 

 are without skins, and therefore cannot be determined with 

 certainty ; they difter in the width of the forehead at the 

 hinder edge of the orbits being greater compared with the 

 length of the skull ; they differ 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 line 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 com- 

 pressed ; and they differ 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 skulls 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 considerably larger, though the skull is smaller, like the 

 figure referred to in De Blainville. 



