1866.] DR. J. MURIE ON CKRCOl'lTHF.CCS ERYTHROGASTER. 381 



inches. 



Body : length from nose to end of tail (in a straight line). . 29 J 



„ length from nape of neck to root of tail 11 



„ girth of chest (at widest) 8 



„ girth of abdomen (at widest) 8 



Tail, in length (its point being imperfect) 16 



Fore limb : length from shoulder to tip of middle digit . . 10 



„ length from shoulder to elbow 4 



„ length from elbow to wrist 4 



„ length of manus 2 



Hind limb : length in a straight line 12^ 



„ length from hip to knee 4 



„ length from knee to ankle 5 



„ length of foot 4 



Head : length from nose to occiput (following curve) .... 5 



,, breadth between the ears 4$ 



„ width between the malar bones 2 



„ width between the outer angles of the orbits 1| 



,, width between the centres of the two orbits Q-fo 



„ distance from tip of nose to meatus auditorius .... 2f 

 „ distance from top of skull to the inferior edge of the 



lower jaw (following the curve) 2-f 



„ girth of head before ears, including mandible .... 7g 



„ ears in length 1 



„ ears in breadth Of 



To preserve the form of the head in the stuffed specimen (now 

 deposited in the British Museum) the skull was retained in the skin ; 

 consequently the cranial bones were unable to be examined. The 

 dentition, however, corresponds to the immature condition of the 

 genus Cercopithecus, the canines (laniarii) being very moderately 

 developed. 



Dental formula : — Incisors j^. Canines ~^. Premolars ~ i& 

 Molars f^. 



The opportunity fortunately occurred of comparing its viscera, 

 side by side, with those of a specimen of Cercopithecus diana, Linn., 

 and of C. cephus, Erxl. There is a correspondence between the three; 

 but the first two agree most closely in several particulars. 



In C. erythrogaster, as in them, the right lung has four lobes, the 

 left one only two, of which the upper lobe is deeply cleft. The heart 

 presents nothing remarkable. 



The stomach is ovoid in figure, with the fundus bulging slightly 

 upwards. There are no sacculations as in the genera Colobus and 

 Semnopithecus. The oesophagus enters nearly midway between the 

 cardiac and oesophageal ends. The transverse diameter from the 

 fundus to the cardiac extremity measures 3£ inches — in a specimen 

 of C. diana about the same age and size, 3^ inches — and in the 

 Moustache Monkey (C cephus), with a body greater in dimensions, 

 only 3 inches. The opposite diameter, viz. from the oesophagus to 



