PHACOCH(EBTJS. 355 



specimina utriusque sexus retulit, nullum vero Suis (Bthiopici ibi 

 yidif'—CEfversigt K. V. Akad. Fork. 1846, p. 121. 



I cannot discover any difference between the skuU. which, we re- 

 ceived from Professor SundevaU as P. ^liani from Caffraria and the 

 skuUs without cutting-teeth which were obtained from Mr. Argent, 

 which are called P. cethiopieus. 



There is no difference, as far as I can see, except size, between the 

 very large skuU of a male from Cape Verde, that was given to the 

 Museum by Mr. T. Tatum, and the skulls from South Africa and Caf- 

 fraria in the Museum collection, and the skuU figured by Dr. Eiip- 

 peU as the type of his P. MHani. 



It is said that P. osihiopi<MS, without upper cutting-teeth, has a 

 soft sac under the eyes, which is not to be observed in P. africanus, 

 that has cutting-teeth in the upper jaw. Perhaps this may be a 

 sexual character ; for it was a male P. cBthiopicus that was first de- 

 scribed, with a large mane of slight bristles. 



The teeth in the lower jaw are generally well developed and large. 

 There is one skull in the British Museum, from Mr. Argent, in which 

 they are nearly worn away to the roots ; they are small. This skull 

 has no upper incisors. De BlainviUe figures a lower jaw in which 

 they are entirely absent, and another in which there are only two 

 very small teeth (Osteogr. Sixs, t. 5, Sus ceAiopicus). 



It has been proposed to divide Phacochcerus into two species, thus 

 \ characterized : — 



! P. cethiopieus. Head short ; forehead convex ; cutting-teeth none 

 labove, and small and deciduous below. 



P. -Mliani. Head elongate ; forehead convex ; cutting-teeth two 

 ip. upper, six in lower jaw, both large and exserted. 



I cannot find any difference in the form of the head and forehead 

 b^ween the specimens with and without cutting-teeth in the upper 

 jaw. The head is as long and the forehead is as concave in the 

 skulls that are destitute of upper cutting-teeth as in those that have 

 them well developed. 



There is a considerable variation in the skulls. The skull of the 

 male from the Zoological Gardens is much broader, and the forehead 

 more concave, than the skulls of the females from the same collection ; 

 but these are from animals that have been kept in confinement. 

 The teeth of the old male are greatly deformed, the grinders being 

 absent on one side of the upper and on the opposite side of the lower 

 jaw, the teeth working into cavities in the alveolar surface. The nose 

 of the skuH below the base of the canines is much broader and more 

 rounded and arched in the males than in the females. The upper 

 canine teeth are nearly of the same form in the two sexes ; those of 

 the males are much the thickest. 



The skull from Cape Verde is longer in proportion to its width 

 than any of the other skulls, the Une alpng the upper surface of 

 the skuU being full three times the lengjjh of the width between 

 the upper edges of the orbits. In other skulls it is twice and a half, 

 or rather more than twice and a half, the width at the same part of 

 the skuU. I cannot see any other character to separate it. 



2a2 



