— io8 — 



Having had the great pleasure of studj'ing the very rich material 

 of this groiip of Mamnials in the Congo Muséum at Tervueren 

 I hope to be able bv the présent paper to add something to our 

 lacking knowledge about them, although I fullv understand that 

 thèse notes are incomplète and need manv additions. 



Before I begin the treatise of the différent forms I wish,however, 

 to express mv verv warm gratitude to D' H. Schouteden, to whom 

 in the first rank the Congo Muséum owes the admirable develop- 

 ment of its zoological collections, for the great liberalitv, with 

 which he bas given mv access to the collections, and for his unti- 

 ring kindness in facilitating mv work in everv way. 



It is chiefly Monkevs from Belgian Congo which are considered 

 in the following, but in some instances regard has also been taken 

 to some related forms from other parts of sequatorial Africa. 



For détermination of the colours I hâve used « Répertoire de 

 Couleurs » by R. Orerthùr and H. Dauthénay, which has been 

 quoted. It must be remembered, however, that in most cases the 

 colours are not absolutely the same, but I hâve tried to come as 

 near as possible, because in this group colour characters are of 

 value even if thev mav varv f. i. between yellow and buff shades 

 and so on. 



Colobus (Piliocolobus) Ellioti Dollman. 



Mawambi (Christy), n°' 1841, 1843, 1844, 1845, 1846, 1848, 

 2iog, 2117, 2888; Lenda (Christy), n° 1836; (Grauer, ex Mus. 

 Wien), n°" 1211, 1212; Moera (Christy), n°' 2803, 2804, 2807, 

 2808, 280g ; Zambo- Béni -Mawambi (Christy) ; Moera- Béni 

 (Christy), n" 2797; Kokoba (Pilette), n°' 1783, 1784, 1785, 1786; 

 Ikanga (Pilette), n° 1788; Béni (Pilette), n° 1790; Kaniki 

 (Pilette), n" 1795 ; Béni (Borgerhoff), n° 1027 ; Penghe 

 (Bequaert), n° 3404; Haut-Ituri (Anzelius), n" 644. 



The verv rich and interesting material quoted above has only 

 further convinced me about the variability of this species, as spé- 

 cimens from one and the same localitv may be verv difFerently 



