Apes. 8 



but considerable doubt was expressed whether they 

 were not simply varieties of the common chimpanzee. 

 These doubts have, however, been set at rest by the 

 acquisition of " Sally " and her " younger sister " 

 and as the latter is of about the same age as the 

 Society's specimen of the common chimpanzee, and 

 is kept in the same cage, it is easy to compare them 

 and we imagine that most persons will agree with 

 Du Chaillu, who said : " I was at once struck with 

 the points of difference between it (the Nshiego) 

 and the chimpanzee. Its great distinction was its 

 bald head. This is its mark." There are, how- 

 ever, other very noticeable differences, not the 

 least of these being the difference in colour of the 

 faces of the two animals. The young bald-headed 

 chimpanzee is at present dark brown, but will no 

 doubt, should she arrive at maturity, become, like 

 " Sally/' perfectly coal black ; forDu Chaillu tells us 

 that the face of a young one he captured was ' ' pure 

 white very white indeed pallid, but as white as 

 a white child's," though its mother was " as black 

 as soot in the face " ; and that the young are 

 invariably light in colour, becoming darker as they 

 arrive at maturity. 



" Sally " has spent more than five years in 

 Regent's Park, having been acquired by the 

 Society in October, 1883, and is probably better 

 known than any other inhabitant of the Gardens. 

 There is a great deal that is quaintly human about 

 her ; but Dr. Brookes, a writer of the last century, 

 went too far when he said of the chimpanzee that 

 B 2 



