186 MR. OLDFIELU THOMAS ON [Nov. 15^ 



2. Cercopithecus erythrotis Waterh. 

 Cercoji'dhecus erythrotis Waterh. P. Z. S. 1838, p. 59. 



c^ . 78, 81. 5 . 74. Bubi Town, Bantabiri, 500 m. 



J. 147. $.160. Bantabiri, 1800 m. 



Well-known as it is by menagerie specimens, few Museums 

 possess any Avild-killed examples of this handsome monkey, and 

 the present specimens are therefoi'e most acceptable. The original 

 types of this monkey, of C. martini, and of Colohus satanas were 

 native-made skins, presented to t\\e Zoological Society's Museum 

 by Mr. George Knapp in 1838, being the earliest zoological 

 specimens known to have come fi-om Fernando Po. 



3. Cercopithecus preussi Matschie. 



$ (young). 165. N. Bantabiri, 1800 m. 



Two native skins. 



Not previously recorded from the island oi- represented in the 

 British Museum. 



Dr. Matschie, during a visit to London, has examined these 

 specimens, and considei's them to be the same as the species 

 described by him under the above name. His types came from 

 Victoria, Cameroons, and he tells me that this southern part of 

 the Cameroons has a fauna very like that of Fernando Po, such 

 species as Golohus satanas, CercojnthecKjS erythrotis, and others, 

 occurring there without modification. The presence of C. jn-eussi 

 in Fernando Po is therefoi-e not surpiising. 



4. Galago demidofpi poensis Thos. 



Galago demidofji j^oensis Thos. Abstr. P. Z. 8. 1904, ISTo. 10, p. 12, 

 Nov. 22. 



J. 152, 153, 162. $.167. Bantabiri, 1800 m. 



" Shot in tree by night."— E. S. 



Similar in all essential respects to the true G. demidoffi of 

 continental West Africa, but the under surface is paler, whitish 

 instead of bufiy. General colour above, of specimens in full pelage, 

 pale russet or cinnamon-brown. Centi'al light line of face white, 

 contrasting more markedly with the general colour than the more 

 or less buffy one of true demidoffi. Hairs of under surface slaty 

 for two-til irds their length, then either white or pale buffy 

 yellowish. Outer side of limbs like body, a line along the inner 

 sides pui-e white ; the hairs white to their bases, and forming 

 prominently white patches below the elbows and thighs. The 

 corresponding regions in true demidoffi are buffy or yellowish, 

 never pure white. Upper surface of hands and feet dull whitish. 

 Tail dail<: brown, darkening shghtly terminally. Ears apparently 

 rather larger, such measurements as are available running from 

 27 to 30 mm., as against 24 to 27 mm. in demidoffi. 



Skull nnich as in demidoffi, though inconspicuously largei'. 



Dimensions of the type, measured in the flesh : — 



Head and body 130 mm. ; tail 195 ; hind foot 46 ; ear 28. 



