3l 
The lower jaw was wanting in each of the foregoing specimens, 
and the occipital or basal part of the skull had been more or less 
fractured in each; the skull of the young but full-grown male of 
the Troglodytes Savagei being the most perfect. 
Captain Wagstaff reached Bristol in a broken state of health, and 
died soon after his arrival. The only information which Mr. Stutch- 
bury was able to obtain from him was, that the natives, when they 
succeed in killing one of these chimpanzees, make a ‘fetish’ of the 
cranium. The specimens bore indications of the sacred marks in 
broad red stripes crossed by a white stripe, of some pigment which 
could be washed off. Their superstitious reverence of these hideous 
remains of their formidable and dreaded enemy adds to the difficulty 
of obtaining specimens. 
Besides the young but mature skull of the male Troglodytes niger, 
of which the permanent dentition was figured in the author’s 
‘Odontography,’ he had compared with Mr. Stutchbury’s speci- 
mens of T'roglodytes Savagei, a skull of a more aged male Troglodytes 
niger with the permanent dentition more worn than in the younger 
adult male of the Troglodytes Savagei. The results of a detailed 
comparison between the skulls of the adult males of the two species 
were then given. Besides the differences of size, as indicated in 
the subjoined ‘ Table of Dimensions,’ the following were among the 
characters establishing the specific distinction of the two chimpan- 
zees. With regard to the dentition, the author observed that, as 
in the smaller species of the Orangs of Borneo (Pithecus Morio), the 
incisive teeth of the smaller species of chimpanzee (Troglodytes 
niger) equalled in size those of the larger species (Troglodytes 
Savagei) ; but that the canines and the molars were considerably 
larger in the Troglodytes Savagei: the series of the five molar teeth 
in this species occupy an extent of 2 inches 7% lines (0°068), whilst 
in Troglodytes niger their extent is only 1 inch 10} lines (0-048). 
The crown of the canine inclines more outwards in Troglodytes 
Savagei; the longitudinal convex ridge on its inner surface is more 
prominent, the anterior groove bounding that ridge being deeper in 
Troglodytes Savage: than in Troglodytes niger: the posterior inner 
groove is continued upon the root of the tooth in Troglodytes 
Savagei. The last molar is more nearly equal in size to the penul- 
timate one, and is more complex in structure, than in Troglodytes 
niger; it has the posterior outer cusp and particularly the posterior 
inner cusp more developed, and it has distinctly the connecting 
cross ridge between the posterior outer and the anterior inner cusp, 
which ridge is not developed in the last molar of Troglodytes niger. 
The bony palate is longer in proportion to its breadth than in 
Troglodytes niger, in which the breadth of the palate between the 
canines is absolutely greater than in Troglodytes Savagei. 
The external sutures between the premaxillary and maxillary 
bones, which disappear so early in the Zroglodytes niger, are more 
or less persistent and traceable in all but the oldest male skull of 
the Troglodytes Savagei; these sutures show that after the pre- 
maxillary bone has entered the nose, of which it forms the lateral 
