Zoological Society. 57 



gated, and the post-orbital processes are considerably larger in pro- 

 portion. The dimensions of the skull are as follows ; — 



in. liii. 



Total length 2 Ij 



Greatest width 1 2^ 



Width between orbits 8f 



Length from the front of the incisors to the first molar 7^ 



Length of palate 10| 



Longitudinal extent of the four molars . . . , 5 



Length of nasal bones 8J 



SciuRus ERYTHROGENYs. Sc. supru, rufesccnti-fuscus, pilis nigra 

 et rufescenti-penicillatis ; gems rufis ; guld, corpore subtils, et 

 artuhus interne albis ; caudd quam corpus breviore, nigrd, albo^ 

 penicillatd, pilis ad basin rufescentibus -, auribus parvulis. 



unc. lin. 

 Longitude ab apice rostri ad caudae basin. ... 8 6 



caudce 6 3 



tarsi digitorumque 1 10^ 



auris 4 



Hab. in Insula Fernando Po. 



The bright rust- coloured cheeks, combined with the pure white 

 colour of the under parts of the body and inner side of the limbs, 

 will serve to distinguish this species. The fur is rather short and 

 moderately soft, and on the upper parts of the body the hairs are 

 black (inclining to greyish at the base) and broadly annulated with 

 rich rusty yellow at or near the point. A shortish longitudinal pale 

 mark is observable on each side of the body near the shoulders. 

 The feet are finely pencilled with black and yellowish white. The 

 tail is rather short and not very bushy, above black and rather spa- 

 ringly pencilled with white ; upon separating the hairs, however, 

 they are found to be of a pale rust-colour near the base, and along 

 the mesial portion of the under side the tail is of a bright rusty red 

 colour. The tarsus is naked nearly to the heel, but on the heel are 

 a few hairs. 



Mr. Fraser's collection also contained a perfect skin of the yinti' 

 lope Ogilbii, an animal originally described from an imperfect speci- 

 men by Mr. Waterhouse in the Society's Proceedings for May 1838, 

 p. 60. 



This animal belongs to the same division as the A. sylvicultrix of 

 authors, and is apparently equal to that animal in size. As in the 

 species just mentioned, the muzzle is naked, and the horns are placed 

 far behind the eye ; they are short, straight (or nearly so) and pointed. 

 Mr. Fraser's notes state that the animal is provided with a gland 

 between the hoofs, and that the female has four teats. 



The fur is short, glossy and adpressed, and of a bright rusty red 

 colour, darkish on the back, and paler on the under parts of the 

 body ; a black mark runs along the back very nearly to the tail ; this 

 mark is broadest towards the shoulders, where its width is about an 

 inch or rather less ; over the shoulders it becomes obliterated, blend- 

 ing gradually into the brownish hue which covers those parts and 



