10 ZOOLOGICAL RESEARCHES 



im Begriffe war , den Mahfa River hinüber zu schwiramen , 

 das ich aber im Caaoe eiaholte und mitten im Flusse ge- 

 fangen nalim. 



8. Cercopithecus büttikoferi., Jentink. 



Bavia (Büttikofer and Sala); Mühlenburg (Büttikofer 

 and Sala) ; Soforéplace (Büttikofer and Sala) ; Buluma (Büt- 

 tikofer and Sala); Grand Cape Mount (Büttikofer); Junk 

 River (Stampfli); Du Queah R. (Büttikofer). 



Iris brown. 



I described this species in the Notes from the Leyden 

 Museum, 1886, Vol. VIII , p. 56. 



Skeleton with 7 cervicales, 12 costales , 7 lurabares , 3 

 sacrales and 32 caudales. 



Lebensweise und Aufenthalt wie bei Cercopithecus camp- 

 bellii^ fast ebenso gemein wie jener. 



9. Cercopithfcus stamp f Hi ., n. sp. 



One specimen , an adult male , from Pessy-country (Büt- 

 tikofer and Stampfli). 



This specimen agrees exactly with a young individual 

 in our collection enregistered by Schlegel in his Catalogue , 

 T. VII , Simiae , p. 90 , under the name C. melanogenys 

 Gray. In comparing our adult and young specimen with 

 Gray's descriptions , it seemed to me that Schlegel had 

 misunderstood Gray and that they belong to a hitherto 

 undescribed species. I wrote to my friend Oldfield Thomas 

 of the British Museum for information as to Gray's type 

 and after his kindly furnished details I now feel sure 

 that 1 have a new species before me. Before describing it 

 I believe it desirable to reproduce the history of Gray's 

 C. melanogenys , thus it will be clear at the same time 

 what are the differences between Gray's and my new spe- 

 cies, how Gray's incorrect descriptions could induce in error 



JVotes from tlie Leyden JMuseuiia , "Vol. X.. 



