KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 58. N:0 2. 19 



face is reddish brown, the colour of the dry skin somewhat resembHng the palest shade 

 of »brownish drab» (Dauthbnay, Rep. de Coul. 302, 1), or in other places a light shade 

 of »burnt umber » (1. c, 304, 1 & 2). The ears have also a similar tint. It is of course 

 difficult to say whether this corresponds to the colour of the living animal, or not, but 

 evidently it has had a light brownish face, perhaps with a russet tinge. 



The old animals have the naked parts much darker, so that at the first look they 

 appear to be quite black in the face. One of the specimens, n:o 224, is really quite black 

 all over the face and on the ears. In two others, n:s 161 & 181, the face is quite black, 

 but on the cheeks the colour might perhaps be termed »reddish black » (Dauthbnay 

 344, 2). In n:s 178 & 163 the cheeks are still somewhat paler, some kind of russet brown, 

 or a pale shade of »brownish drab» (302, 1) spotted with black. The brown is there also 

 more or less found around the eyes. In the oldest male, n:o 70, the brown dominates, 

 only the centre of the face being black, and the cheeks and the crown brown, mottled 

 with black. 



In the young animals only the face is naked, already the fore-head a little above 

 the eyes being sparingly beset with black hairs. All the adult animals display baldness 

 in various degrees and differ by this characteristic from Anthr<ypopithecus adblfi-friderici 

 Matschie from the Bugoje-forest northeast of Lake Kivu about which Matschie says:^ 

 »Eine Stirnglatze ist nicht vorhanden. » In the female 224 and the male 163 there is a 

 triangular bald patch with the base at the eyebrows and extending with the point about 

 6 Va cm. backwards from a line connecting the corner of the eyes. In the female 161 this 

 patch is a little broader and more irregular, but does not extend further back. In the 

 females 181 & 178 the bald patch is both broader and about 1 cm. longer so that it reaches 

 to the level of the ears. In the male n:o 70 the bald area is still larger, extending broadly 

 about 10 Va cm. from the line through the corner of the eyes. The baldness increases 

 evidently with age, n:o 178 being the oldest female and n:o 70 the oldest male. 



In the young ones the black hairs surrounding the face are very long so that about 

 8 — 8 Va cm. long whiskers are formed on the sides of the face, almost conceahng the ears, 

 behind which there are also equally long and broad tufts, standing out 8 — 9 cm. from the 

 nape. On the crown the hair only grows to a length of about 2 Vz cm. and is not laid in 

 any particular direction, nor erect. The whiskers begin at the sides of the forehead and 

 cover from there the buccal region. They are standing out straight laterally in their 

 upper parts, but become gradually more and more directed forwards and downwards 

 and thus merge into the much thinner, black beard which is directed forward from be- 

 hind the greyish white chin, the hair of which latter is short. The hairs on the neck below 

 the ears are also very long and directed forward so as to support the whiskers from be- 

 hind. The hair of the upper back is about 7 — 8, on the lower 5 — 6 cm. The white hair 

 above the vent about 5 Vaj below the same about 3 Va cm. The fur is comparatively soft, 

 but not at all woolly or silky. 



In the adult specimens the same general arrangement of the hairs may be recognized, 

 but it is by far not so conspicuous, because the hairs around the face are not at all elongate, 

 or at least not in same degree as in the young ones. In the old male (70) the hairs of 



1 Ann. Soc. roy. Zool. et Malac. de Belgique^ t. XLVII, 1912. 



