48 DR, J. E. GRAY ON THE SUID^. [JaU. 0, 



cutting-teeth that have the premolars still present and the hinder 

 molar small, and there are specimens which have the cutting-teeth 

 that have lost or are losing the premolars and have the hinder 

 molar very large and well developed. 



Nine of the skulls or front parts of the upper jaws were bought 

 of Mr. Argent, who purchased them all together with a collection of 

 Cape skins : five of these jaws have distinct teeth in the upper jaw, 

 and four of them are without any indications of them ; therefore the 

 presence or absence of the upper cutting-teeth is common to ani- 

 mals inhabiting the same locality, not peculiar to the Phacochere of 

 different districts of Africa as has been supposed. 



Professor Sundevall observes, " Sus (Phacoch.) csliani, Crzm. ; 

 Ph. harroya, Ehr., in Caffraria a Wahlbergio inventus est. Plura 

 specimina utriusque sexus retulit, nullum vero suis iEthiopici ibi 

 \\A\tr—(Efversigt K. V. Akad. Fork. 1846, p. 121. 



I cannot discover any difference between the skull which we re- 

 ceived from Professor Sundevall as P. cBliani from Caffraria and the 

 skulls 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 skull of a male from Cape Verde, that was given to 

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

 and Caffraria in the Museum Collection, and the skull figured by 

 Dr. Riippell as the type of his P. CBliani. 



It is said that P. cethiopieus, 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 that may be a 

 sexual character ; for it was a male P. cethiopieus 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 whicli 

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

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

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

 very small teeth (Osteogr. Sus, t. 5, Sus cethiopieus). 



It has been proposed to divide Phacoehcerus into two species, 

 thus characterized : — 



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

 above, and small and deciduous below. 



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

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



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

 between 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 auimals that have been kept in confinement. 



