PAPIO CTNOCEPHALUS. 
67 
many as eight bands can be counted, with the base of the hair yellowish brown. 
Almost the same number can be detected in hairs measuring about 136 mm. long. 
In the long hairs on the sides of the shoulders, measuring 283 mm. long, only 
three yellow bands can be detected, the great mass of the hair along its basal 
portion being yellowish. It is the black and yellow bands and the black tip that 
produce the yellowish-olive colour of this baboon. On the top of the head and on 
the front of the limbs the black tips are more marked than on the rest of the body, 
but these parts, with this trifling exception, are concolorous with the rest of the 
body. When the hair is turned aside the basal portion looks greyish brown, but 
when an individual hair is examined the base is seen to be yellowish brown. 
The type of P. thoth subsp. iheanus, Thomas, so exactly resembles the foregoing 
individual in all its external characters, that, after I had examined it, I felt at once 
disposed to localize the type of P. thoth, Ogilby, and to assign it to Lamu, or at least 
to some part of the African coast near that locality. Indeed so alike is this Lamu 
baboon to P. thoth, that it is quite unnecessary to describe it. The degree of annula- 
tion on the pectoral region in baboons referable to this species is subject to a good 
deal of variation in different localities, but in these two it is identical, the rings on 
the hairs being equally well developed in both and the numbers the same. The 
dense line of white hairs on the cheeks and the long grey hairs over the toes are 
present in both. 
The type specimen of P. langheldi, Matschie, was first mentioned by Noack h It 
was obtained on the eastern slopes of the Unguru Mountain, about 161 kilom. to the 
west of the coast-line opposite to Zanzibar, and 600 kilom. to the south-west 
of Lamu; but Matschie in describing this individual had also before him a portion 
of a skin of another from Tanga, on the coast opposite to the island of Pemba. 
The Berlin Museum also possessed a skull from Ukami, which lies about 100 kilom. 
to the south of Unguru. TVo skulls, male and female, from the district of Usukuma, 
at the south-east.end of Victoria Nyanza, 600 kilom. to the north-west of Unguru, 
were also regarded by Matschie as belonging to the same species ; and the circum¬ 
stance that he believed that he had been able to gather a clearer impression of the 
characters of his langheldi by a study of these two skulls from Usukulna led him to 
name the species after their collector, Mr. Langheld. 
The type of P. langheldi has longish hairs on the vertex and long hairs on the 
shoulders, some of them, according to Matschie, being as much as 440 mm. long. The 
hairs on the lumbar and sacral regions are short. The general colour is more or less 
dirty olive-grey, or even greyish yellow, with an admixture of black-tipped hairs on 
the front of the shoulder over the lower portion of the fore limb, but more especially 
^ Jahrb. Hamb. Anst. ix. 1891, i. p. 143. 
