42 Dr. J. E. Gray on the Species of Hyrax. 
The skeleton with a skull (724 e), in the British Museum, 
of a young animal with milk cutting-teeth, has a subtriangular 
interparietal, somewhat like that of H. Burtondi. 
In the British Museum there is the skull and skeleton of 
a very young animal, received from the Zoological Gardens 
(No. 724), which is peculiar for 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 incom- 
plete. De Blainville figures a skull of a young specimen 
(Ostéog. 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 dorsalis (No. 1142 c) ; 
but we have a skull 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 skull is so dis- 
tinct from any other in the collection that I propose to designate 
it provisionally Hyrax semicircularis. | 
The interparietal bone being on the edge of the occipital 
region of the skull is a character (as well as the incomplete 
orbit) that separates the skull of Hyrax and Dendrohyrax, 
even in the youngest state. 
* Dorsal spot black, well marked. Africa. 
1. Hyrax capensis. The Klipdas. 
Fur black, minutely punctulated with white, with a black 
dorsal streak. 
Hyrazx capensis, Schreb. Saugeth. 920, t. 240; Cuvier, Oss. Foss. ii. 127, 
141, t. 1, 2,3; Gray, List Mam. Brit. Mus. 187; Gerrard, Cat. Bones 
Brit. Mus. 283; Blainville, Ostéograph. t. 2 (teeth & skull); W. Read, 
P. Z. 8. 1835, p. 13. 
Cavia capensis, Pallas, Misc. 84, 35; Spicil. ii. 22. t. 2. 
Marmotte du Cap, Buffon, Suppl. iii. 177, t. 29. 
Hab. South Africa, Cape of Good Hope. (Dr. Andrew 
Smith.) 
Var. Dorsal streak indistinct. 
Cape of Good Hope (Dr. Krauss). Skull and skeleton, B.M. 
For anatomy, see Pallas, Miscell. /. c.; Owen, P. Z.S. 1832, p. 202; Mar- 
tin, P. Z. 8. 1835, p. 18; Murie, P. Z. 8. 1865, p. 329. 
But I am by no means sure that several species is? not be 
confounded under this name; for all the specimens formerly 
received at the Zoological Gardens were called H. capensis. 
