PAN 23S 



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. calvus 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 



