Dr. J. E. Gray on the Species o/Hyrax. 49 



animal in the British Museum (No. 724/) 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 B. dorsalis. 



a. Orhil complete. Dendrohyrax. 

 1. Dendrohyrax dorsalis. 



Fur 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. ahjssinicus, Read, MS. Mus. Zool. Soc. ; Gerrard, Cat. Bones B. M. 284 



(no. 725 a). 

 Hyrax arboreus, Blainv. Ostdogr. t. 2, skull and teeth (not A. Smith) ; 



Gerrard, Cat. Bones B. M. 284. 



Hab. West Africa (Verreaux). Fernando Po (Fraser) : B.M. 

 Ashantee (Kead). 



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 ' Osteographie,' and with the 

 skull without a lower jaw in the British Museum. 



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. S. 1864, p. 656? 



Hab. South Africa (A. Smith) : a young specimen with 

 Ann. & Mag. N. Hist. Ser. 4. Vol. i. 4 



