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Dr. J. E. Gray on the Species of Hyrax. 4} 
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 6, 724c, and 724 d, which were all 
received from the Zoological Society without skins; and the 
hinder openings to the nostrils are more contracted in those 
named //. capensis than in H. syriacus. 
De Blainville (Ostéograph. 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 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. 
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 differ 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 
E flat space on the crown, even the skulls of adult animals. 
No. 725 (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. 7246. Rather smaller and wider than 725c, 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 ¢ and d are smaller than either 725 c or 724 db. 
The teeth are very large, the nose"is narrower and more com- 
peeees and they differ from both the above in the crown 
ing wider and forming a broad band to the occipital crest. 
In 724d 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 
(Ostéograph. 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 g), 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. 
