Se en ee 
Dr. J. E. Gray on the Species of Hyrax. 37 
streak comparatively slightly marked and of a pale colour, and 
the fur is short and close. There is a single young specimen, 
received from a French collector as from Senegal, very like 
those from Egypt, showing that this species has a very wide 
distribution in Africa. 
The second, of an iron-grey colour, was brought from 
Angola by Dr. Welwitsch. Dr. Peters names it H. arboreus ; 
but it is quite distinct from that species. I have called it H. 
Welwitschit. 
The other three species have very soft close fur; and they 
differ from one another in the colour of the fur and of the se- 
arate hairs. The first, which I believe is the Ashkoko of 
ruce, is very like a wild rabbit in general colour, and is white 
below; the hairs have a black subterminal band and a yellow 
tip, which gives the fur a minutely and closely punctulated 
appearance. The second is somewhat like the former, and 
also said to come from Abyssinia; but the fur is pale yellow 
grey, minutely and slightly varied with black hairs, but not 
punctulated, and the hairs have no subterminal band; and the 
underside is yellowish. The third, which is the species found 
in Palestine and Arabia, is of a nearly uniform reddish-yellow 
colour, and has longer and softer hairs of a nearly uniform 
colour. 
Sir Andrew Smith, in the Trans. Linn. Soc., described 
a South African species under the name of H. arboreus; and 
Mr. Fraser described a West African species under that of 
H. dorsalis. Both these species are distinguished by having 
a white dorsal spot. The type specimen described by Mr. 
Fraser, and a young specimen received from Sir Andrew Smith 
of his H. arboreus, are in the British Museum. 
M. Blainville and other French zoologists have confounded 
the H. dorsalis of West Africa with the H. arboreus of the 
Cape, which are most distinct species, as proved by the types 
in the British Museum. Dr. Peters described the H. arboreus 
as found on the coast of Mozambique and also in the interior 
at Tete. 
The animals with the white dorsal spot have a very different 
skull and teeth from the other species which have a black or 
yellow dorsal spot. Sir A. Smith observed the peculiarity of 
the teeth when he described H. arboreus. 
The colour-spots on the back consist of the hair that covers 
the situation of a dorsal gland on the vertebral line, about 
’ halfway between the shoulders and the pelvis. 
In the species which have the hair yellow or white the 
streak is generally narrow and linear; in the species in which 
the spot is black, it is generally broad and diffused. In some 
