PAN 235 
Simia calvus Matschie, Sitzungsb. Ges. Naturf. Freunde, 1904, 
p. 60; Rothsch., Proc. Zool. Soc. Lond., 1904, p. 424. 
BALD-HEADED CHIMPANZEE. 
Type locality. Camma country, south of Cape Lopez, Gaboon. 
Geogr. Distr. Yaundi Station, and Bifindi on the Lokundje, 
Cameroon, (G. Zenker) ; Kuilu, (Falkenstein) ; Ebol’woa, (Bulow) ; 
Gaboon and Southern Cameroon, West Africa. 
Genl. Char. Head bald to the level of the middle of the ears 
behind; ears very large; beard thin, long, only on side of face; chin 
covered with white hairs; face brownish black. 
Color. Female. Head and body except lower back, arms, hands 
and feet, black, lower back and legs pale brownish gray. 
Measurements. Female. Head and body, 3 ft. 7 in.; arm, 29 in. 
Male. Height, 4 ft. 4 in. Skull: total length, 173; occipito-nasal 
length, 134; intertemporal width, 71; breadth of braincase, 98; Hensel, 
120; zygomatic width, 122; breadth of rostrum at canines, 60; extreme 
breadth of bony orbits (outside), 101; palatal length, 66; length of 
upper molar series, 45.3; length of mandible, 124.5; length of lower 
molar series, 49.9. Ex type British Museum. 
The skull of the type resembles that of P. KooLOo-KAMBA in its 
long and broad braincase, but the anterior end of the rostrum is not 
so broad and stands out at a sharper angle to the face. The orbits 
seem higher on account of the orbital ridge being straighter, and 
without the depression in the center over the septum, and this last is 
not so wide. The zygomatic arches are not spread, but extend in a 
direct line, and are narrower posteriorly. The bony palate is narrow- 
est posteriorly, widening as it goes, and is broadest between the canines. 
The braincase is rounded, very broad at the occipital region, and like 
P, KOOLOO-KAMBA is without a crest. 
Du Chaillu says, “the natives of the Camma Country call the T. 
niger (satyrus Linn.), ‘Nschiego,’ and the T. calvus ‘Nshiego Mbouve,’ 
the latter meaning something like another tribe of the Nschiego. The 
Mpongwe called the T. niger ‘Nschiego,’ or the N’chego of Dr. Fran- 
quet. The T. catvus builds a shelter made with the branches of trees, 
elevated generally from twenty to thirty feet, they tie together with 
wild vines the branches they have collected, and there is below the 
shelter (which has the shape of an umbrella) a horizontal branch on 
which they rest; this horizontal branch is always the first from the 
ground. The male lives under one shelter, and the female under 
another on a neighboring tree.” 
He further states in his “Equatorial Africa” that “the nshiego 
