IX HEE CONES 28 
other hand they differ from most Ungulates in the incisors grow- 
ing from persistent pulps, a point in which they resemble the 
Rodentia. The muffle also is split as in those animals. The 
Hyracoidea are peculiar in the fact that in addition to the caecum 
at the junction of the small and large intestines, there are a pair 
of caeca (bird-like in being paired) some way down the large 
intestine. The dorsal vertebrae are unusually numerous, 22. The 
adult dentition according to Woodward,’ who has recently ex- 
amined the matter, is 14 C (}) Pm ¢ M 3, while the milk 
dentition is 13 C+ Pm #. 
The inclusion of the canine of the permanent set of teeth in 
brackets signifies that it is the milk canine which occasionally 
Fic. 120.—Cape Hyrax. Hyrax capensis. xi. 
persists. It should further be remarked about the teeth that 
they are both hypselodont and brachyodont, the extremes being 
connected by intermediate forms. Another peculiarity of the 
genus is the dorsal gland, which is covered with hair of a different 
colour to that covering the body generally. This is present in all 
species. 
The genus Hyraxz (the most recent authority on the subject, 
Mr. Oldfield Thomas,’ only allows one genus) is limited in its 
range to Kthiopian Africa and to Arabia, including Palestine, 
It does not reach Madagascar. Mr. Thomas allows fourteen species 
with two or three sub-species. 
1M. F. Woodward ‘‘On the Milk Dentition of Procavia (Hyrax) capensis, 
etc,” Proc. Zool. Soc. 1892, p. 38. 
9 
* “On the Species of the Hyracoidea,” Proc. Zool. Soc. 1892, p. 50. 
