3. DENDEOHTKAX. 291 



the process of the lower jaw in front of the condyle ; but in this 

 respect it also differs from the type specimens of Euhyrax ahgssini- 

 cus. In both skulls the upper edge of the occipital bone is narrow, 

 as in Hyrax. 



Dr. Peters has, since the above was written, sent me the following 

 observations on iProfessor Ehrenberg's specimen in the Berlin Mu- 

 seum : — "H. habessinicus is a very good species, and may prove to be 

 the same as the H. dorsalis. There is a figure of a younger speci- 

 men in his work ' Symbolae Physicse,' Mammalia, pi. 2. f. 2, together 

 with H. syriacus. As you wiU see from the text, the skull is quite 

 different from that of H. capensis, H. syriaeus (ruficeps), and H. ar- 

 bor eus. The zygomatic arch is lower than on its junction with the 

 zygomatic process of the maxiUary bones ; but the teeth are small, 

 as in H. arhoreus. The hair is harsh, black and grey ; and the hair 

 of the belly is much shorter, greyish, sometimes yellowish, without 

 soft fur." 



" The skull of my specimen from the coast (regarded as H. arhoreus 

 in the ' Mammalia of Mossambique ') agrees pretty weU with that of 

 H. habessinicus and with another skull sent by Heuglin from Abys- 

 sinia. I cannot understand how this species could be confounded 

 with H. capensis." 



IT. ahyssiniciis cannot be H. dorsalis, as the former has a black 

 and the latter a white dorsal spot, which is well marked in both 

 species. 



3. DENDKOHYEAX. 



SkuU rather elongate, with a broad flat crown, separating the 

 entire length of the temporal muscles in the adult animal ; nose 

 elongate, produced. Diastema elongate, longer than the length of 

 the outer sides of the first three premolars ; grinders and premolars 

 in a nearly straight line, and nearly of the same form, the front pre- 

 molar being only a little smaller. Orbit complete (or incomplete 

 even in a mature skull). 



Dendrohyrax, Gray, Ann. Sf Mag, N. H. ser. 4. i. p. 48. 



Nose rather produced ; forehead flat; temporal muscles moderate, 

 separated in the adult skull by a broad flat crown ; the upper edge 

 of the occipital bone thick, broad, forming part of the crown ; lower 

 jaw broad, rounded behind. Lower cutting -teeth moderately long, 

 rather contracted at the base j upper edge dilated and divided into 

 three nearly square, rather spathulate lobes. The lower cutting- 

 teeth are rather elongated in the older animal, but never so long and 

 slender at the base as in the true Hyraoes. The upper cutting-teeth 

 of the milk series are rounded in front, and obliquely truncated, 

 spathulate at the end. The canine of the adult series is trigonal, 

 with the keel in the front as in the true Hyraces. The diastema 

 between the canine and the first premolar, in the adult skull, is 

 elongate, as long as the outer margin of the three. premolars. The 

 grinders form a very slightly arched series. The true grinders mo- 

 derate, not much larger than the broad square premolars. The first 

 peirmanent premolar nearly as large as the second one. 



\s2 



