66 CEBUS 



should be so greatly confused. The writer has examined all the 

 types of Cebus that are accessible at the present time, and his 

 descriptions have been taken from them as they now appear, some 

 much changed from their former state, with the delicate colors gone, 

 and occasionally important portions of the fur having disappeared 

 also ; but the manner in which the various colors are distributed could 

 in some cases still be traced, and an idea of the animal's original 

 appearance might thus be obtained. When types were altogether 

 missing, and the description first given was insufficient for the recog- 

 nition of the species, and there was no other example from the same 

 locality to show what the type may have been, little could be accom- 

 plished, and the species would have to be dropped altogether as unde- 

 terminable, or allowed to stand with the original description as a 

 guide, in hopes that some one more fortunate, might in the future be 

 able to discover what it really might be. The species that follow are 

 believed to be all of the genus Cebus existing to-day that are known, 

 twenty-four in all, but the types of some, embraced in the various 

 synonyms, no longer existing, the conclusions in such instances have 

 been reached through the, often imperfect or too brief, descriptions 

 originally published. 



LITERATURE OF THE SPECIES AND SUBSPECIES. 



1758. Linnaus, Sy sterna Naturs. 



Two species of Cebus are given in the list of Simias, 5". apella 

 and 5". capucinus. These were described by Linnaeus in a 

 work entitled 'Museum Regis Adolphi Frederici,' published in 

 1754. The original description, slightly transposed, is repeated, 

 and the above work the only reference cited. 



1766. LinncBus, Sy sterna Naturcc. 



The two species of Cebus described in the 10th edition appear 

 again here, with the same descriptions, but in the case of C. 

 capucinus farther on, Linnaeus unfortunately, gives a more 

 lengthy description and in certain parts a very erroneous one, 

 i. e. "pectus ferrugineus," which in no wise is ever the case in the 

 color of the animal he originally described and figured as C. 

 CAPUCINUS. This error has been the cause of the transference 

 of the name C. capucinus to an entirely different animal, the 

 one Linnaeus called C. apella, and these two species have had 

 the wrong appellation applied to them since that time by all 

 Mammalogists, even though some writers had discovered the 



