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Dr. J. E. Gray on the Species of Hyrax. 49 
animal in the British Museum (No. 724 f) that agrees with 
the skull just described in having the upper part of the occi- 
pital bone broad and forming part of the crown, and in having . 
complete orbits. It also has a very large, broad, transverse 
interparietal bone, nearly as wide as the convex crown of the 
skull; but this is four-sided, and twice as wide as high, as if 
formed of two squares united in the middle; the outer sides of 
the bone are rather angular in the middle. I suspect this is 
the young animal of D. dorsalis. 
a. Orbit complete. Dendrohyrax. 
1. Dendrohyrax dorsalis. 
Far rigid, bristly, blackish ; dorsal spot elongate, pure white. 
Young—fur soft, silky, reddish brown; back with a broad 
dorsal streak. 
Hyrax dorsalis, Fraser, Proc. Zool. Soc, 1852, p. 99; Verreaux, Cat. 
H. abyssinicus, Read, MS. Mus. Zool. Soc.; Gerrard, Cat. Bones B, M. 284 
(no. 725 a). : 
Hyrax arboreus, Blainy. Ostéogr. t. 2, skull and teeth (not A. Smith) ; 
Gerrard, Cat. Bones B. M. 284. 
Hab. West Africa (Verreaux). Fernando Po (Fraser): B.M. 
Ashantee (Read). 
There are two adult skulls of this species in the British 
Museum—one obtained from Fernando Po, and the other re- 
ceived from Mr, James Read, who obtained it from the cap of 
an Ashantee negro. In both the forehead is flat, rather con- 
cave between the orbits, and the orbits have a complete bony 
ring; they both agree exactly with the figure of the skull of 
H. arboreus in De Blainville’s ‘ Ostéographie,’ and with the 
skull without a lower jaw in the British Maser. 
There are the skeleton and skull of a young specimen in the 
British Museum, purchased from Mr. Jamrach ; and this skull 
agrees with the two adult ones in the concavity of the forehead 
over the orbits and the complete bony rings to the orbits. 
2. Dendrohyrax arboreus. 'The Boomdas. 
“Fur reddish fulvous, varied with black; sides reddish 
white mixed with black; underside and inner sides of limbs 
whitish; with a central white dorsal streak.” (A. Smith.) 
_ Young—fur very soft, long, abundant, dark black grey, varied 
with paler grey; lips, chin, throat, underside of body, and 
inner sides of limbs white. B.M. Skull ? 
Hyrax arboreus, A. Smith, Linn. Trans. xv. p. 468; Peters, Mossamb. 182 ? 
(not Blainville) ; Kirk, P. Z. 8. 1864, p. 656? 
Hab. South Africa (A. Smith): a young specimen with 
Ann. & Mag. N. Hist. Ser.4. Vol. i. 4 
