256 MB. p. L. SCLATER o's THE [Mar. 14, 



who in 1883 was sent out to French Congo on a special mission 

 to explore the Natural Products of the new French territory 

 between Gaboon and the river Congo. 



Appendix. — Index specieywn mihi nondum ohviarum* 



1. CeECOPITHECUS BOTJTOTJBLDSri. 



Cercopithecus boutourlinii, Griglioli, Zool. Anz. x. p. 510 (1887). 



Cercopithecus alhigidaris, Gigholi, Ann. Mus. Civ. Gen. ser. 2, 

 vi. p. 8 (1888). 



Hcd>. Central Africa. 



This species was based on a specimen transmitted to the Florence 

 Museum from Kaffa, X.E. Africa, by Dr. Traversi. It has been 

 subsequently united to C. alhogidaris. 



2. Cebcopithecus flatidus. 



Cercopithecus Jlavidus, Peters, Eeise n. Moss., Siiug. p. 3, t. i. h. 



Hah. Mozambique. 



" AUied to C. rufo-viridis and C. albogidaris." — Peters. 



3. Cercopithecus grati. 



Cercopithecus grayi, Fraser, Cat. Knowsl. Coll. p. 8 (1 850) ; 

 Gray, P. Z. S. 1868', p. 182 ; id. Cat. Monk. B. M. p. 22 (1870). 



Rab. West Africa {Knoivsley Coll.). 



This is said to be very closely alhed to C. mona, but to differ in 

 having a yellowish-white spot over each eye, and a black stripe on 

 each side of the head from eye to ear ; up the centre of the 

 forehead runs a darkish stripe, each hair being annulated with 

 black and greenish yellow. There are no white spots on the 

 crupper. 



4. Cercopithecus labiatus. 



Cercopithecus labiatus, Geoffr. Compt. Eend. Acad. Sci. xv. 

 p. 1038 (1842) ; id. Diet. univ. d'Hist. nat. iii. p. 302 ; id. Archiv.* 

 du Mus. ii. p. 555. 



Hah. West Africa? 



Sonivitimes considered to be the same as C. samango. Based on 

 a single menagerie specimen. 



5. Cercopithecus monoides. 



Cercopithecus monoides, Geoffr. C. R. xv. p. 1038 (1842 ; descr. 



* The following species is no doubt a Cercocebus, allied to C. alhigena: 



Cercopithecus aterkimus. 



Cercopithecus aterrimus, Oudemans, Zool. Gart. xxxi. p. 267 (1890). 



Hab. Central Africa : Stanley Falls on the Congo. 



