62 



and the liairs being divided on the back, as in most of the species of 

 the genus Colobus. The average length of the hairs of the back is 

 about two and a half inches ; on the hinder half of the back, how- 

 ever, they exceed three inches. These hairs are grey at the base, 

 and the remaining portion of each hair is black, with broad yellow 

 rings, the latter colour prevailing. On the posterior half of the 

 body, and the outer side of the hinder legs, the hairs are of a deep 

 slate grey, and almost of an uniform colour ; some of those on the 

 middle of the back are obscurely freckled with deep yellow, and 

 those on the thigh are very indistinctly freckled ■with \vhite. The 

 belly, inner side of limbs, fore part of thigh, chest and throat are 

 white. The hairs of the cheeks and sides of neck are verj^ long, and 

 of a greyish white colour, grizzled towards the apex with black and 

 yellow ; some whitish hairs tipped ■vvith black are observable across 

 the fore part of the forehead. The inner side of the cars is fur- 

 nished with very long hairs of a greyish white colour, obscurely an- 

 nulated -vvith grey and pale yellovi^ ; these hairs vary from three 

 quarters to one inch in length. The fore legs are black externally, 

 and the hairs on this part are comparatively short. The hairs on 

 the upper side of the tail are grizzled with black and dirty yellow, 

 and on the under side •vvith black and brownish white. The apical 

 portion of the tail, which is furnished ■vvith longish hairs, (as in Cerc. 

 Pogonias), is black, the black hairs occupying about one third of 

 the ^vybole length of the tail. 



" I have named this animal after the late Governor ofSierra Leone, 

 Major Campbell, that gentleman being its discoverer." 



Mr. Ogilby exhibited and described various species of Kangaroo 

 Rats {Hypsiprymnus) from the Society's Collection, and read extracts 

 relating to them from a paper which he had prepared upon the sub- 

 ject so long ago as the year 1832; and which, though partly read 

 before the Linnean Society at that time, had never been made public, 

 owing to the imperfection of the materials then in this country for 

 the perfect illustration of the genus. Reserving the detail of his 

 observations for an express monograph, Mr. Ogilby briefly charac- 

 terized the following species : — 



1. Hyp. setosus: described in the Proceedings for 1830-31, 

 p. 149. 



2. Hyp. myosurus: easily distinguished from all the other species 

 by its much shorter tail and tursus ; the former organ being scaly, as 

 in the true Rats. 



3. Hyp. melanotis : a large species with longer ears than its con- 

 geners, and readily distinguished by the dark brown colour of the 

 hair which covers the organs, as well as by its superior size. In 

 the Zoological Society's Museum. 



4. Hyp . formosus : a beautiful small species of a light russet- 

 brown colour, the latter half of the tail white. This species has been 

 for many years in the Collection of the Linnean Society. 



5. Hyp. Phillippi : pale brown, with a slight shade of russet above, 

 dirty white beneath ; tail long, cylindrical, covered with short, ad- 



