Dr. J. E. Gray on the Species o/Hyrax. 43 



** Dorsal streak yellow^ linear. 

 a. Fur harsh. 

 2. Hyrax Burtonii. 

 Fur rather harsh, pale yellow grey, very slightly pimctulated 

 with blackish ; dorsal streak small, yellow ; the hairs of the 

 back rather rigid, black or dark brown nearly the whole length, 

 with a moderate yellow tip ,• underside pale yellow ; inter- 

 parietal bone half-ovate, as long as broad. 



Hyrax syriacus, Gray, List. Mam. B. M. 



H. ahyssinicus, Burton, IMS. B. M. ; Gerrard, Cat. Bones B. M. 284. 



Hah. North Africa, Egypt (James Burton, Esq.) : three 

 specimens and a skull in B.M. Senegal (Parzudaki) : a young 

 specimen in B.M. 



The imperfect skull sent by Mr. James Burton from North 

 Africa, with the skins, which I have named H. Burtonii 

 (No. 725 b), is not quite adult, as the hinder or third upper 

 true molar is not quite developed. It is very like No. 724 c in 

 size, form, and in the form of the crown ; but the notch left 

 by the interparietal (for it is lost with the hinder part of the 

 skull) shows that that bone was of a half-oval shape, and rather 

 longer than broad, being rather wider but not near so long 

 compared with its width as the interparietal figured as that of 

 H. syriacus by De Blainville (Osteograph. t. 2). This skull 

 differs from those numbered 724 c and d in being higher behind 

 when placed on its upper grinders, and in the forehead being 

 slightly more convex in the middle below the orbit. 



3. Hyrax Welwitschii. 

 Fur short, rather harsh, iron-grey-grizzled ; hairs of upper 

 part of the back black, with a large white subapical ring ; of 

 the sides dirty brown, with a white ring ; dorsal streak yellow, 

 moderate. 

 Hyrax arboreus, Peters, P. Z. S. 1865, p. 401 (not A. Smith). 



Hah. Rocky places on the shores of the River Maiomba, in 

 the district of Mossamedes (Welwitsch, I. c). 



The adult skull of H. Welwitschii, lent to me by Dr. Wel- 

 witsch, differs from all the preceding in being considerably 

 broader in proportion to its length. The nose is compressed, 

 the crown is flat to the occipital ridge, wide in front, and gra- 

 dually narrowing behind. The interparietal bone (which is 

 partly destroyed by a hole made to extract the brain) is very 

 small and nearly triangular ; the teeth are large, and the palate 

 rather narroAv, cnmjiared with the other skulls. The diastema 



