180 ME. F, E. BEDDA.ED— CONTEIBUTIONS TO THE 



M. Du Chaillu's ^ description of the external characters of T. calvus agrees nearly 

 absolutely with the above description of " Sally." I should, however, be inclined to 

 dispute, on the hypothesis that " Sally " is an individual of that species, M. Du 

 Chaillu's statement that the ears, though large, are smaller than in T. niger. Dr. Gray -, 

 it should be remarked, was disinclined to allow the species, and remarked later ^ that 

 " the specimen received with the above name in the Museum was in too bad a state to 

 determine with accuracy if it is distinct from T. niger. The baldness of the forehead 

 appeared to be accidental." After this opinion, which certainly erred on the side of 

 caution, it is curious to find a brief diagnosis of what is perhaps the " worst species " 

 of Chimpanzee ever described, viz. T. vellerosus, immediately following. The N'tschego, 

 according to Dr. Franquet, has a black face and small ears, thus contrasting with the 

 Common Chimpanzee, which has a flesh-coloured face and very large ears. He says, 

 as M. Du Chaillu has remarked, nothing about the baldness, which, if at all marked, 

 would hardly have escaped his attention. We may therefore assume that there was 

 no baldness; the smallness of the ears again distinguishes the animal described by 

 Franquet and by Duvernoy. With regard to the black face, Du Chaillu says that old 

 Chimpanzees of the common species are black in the face. The name also appears to 

 have misled Dr. Franquet. According to Du Chaillu, " the natives of the Camma 

 country call the T. niger ' Nschiego ' and the T. calvus ' Nschiego M'bouve,' the latter 

 meaning something like ' another tribe of the Nschiego.' The Mpongwe called the 

 T. niger ' Nschiego,' or the ' N'chiego ' of Dr. Franquet." Du Chaillu considered that 

 the N'chiego of Franquet is simply T. niger, and, as I point out below, there is nothing 

 in the osteology to contradict this opinion. I quite agree with Geoffroy St.-Hilaire 

 when he writes * : — " Le Troglodytes tschego a ete regarde avec raison par tons les 

 zoologistes comme une espece au moins tres-douteuse." Geoffroy St.-Hilaire remarks 

 also in this paper that a specimen of Franquet's species was on its way to the Paris 

 Museum. In 1866 ^ MM. Gratiolet and Alix described, in an elaborate and well- 

 illustrated memoir, the external characters and anatomy of a species of Chimpanzee 

 which they called Troglodytes aiihryi. The anatomical account given in the paper is 

 much fuller and more important than the section dealing with the external characters ; 

 for post-mortem changes had caused the almost complete loss of the hair and of the 

 skin itself in the palmar and plantar regions. Nevertheless it is possible to institute 

 comparison between that Chimpanzee and the animal which forms the subject of the 

 present communication, which will be more valuable inasmuch as both individuals are 

 females and of about the same size. This Troglodytes auhryi, which has been con- 



' Proc. Boston Nat. Hist. Soc. 1860. - P. Z. S. 1861, p. 273. 



' ' Catalogue of Monkeys, &c.' 1870, p. 7. 

 '' Arch. d. Mus. t. x. p. 17, footnote. 



* " Eecherohes sur I'Anatomie du Troglodytes auhryi, Chimpanze d'une espece nouveUe," Nouv. Arch. Mus. 

 d'Hist. Nat. t. ii. (1866) 264 pp. 9 pis. 



