382 DR. J. MURIE ON CERCOPITHECUS ERYTHROGASTER. [June 26, 



the greater curvature, is 2^ inches in C. erythrogaster, 2 inches in 

 C. diana, and 1£ inch in C. cephus, showing this organ to be com- 

 paratively the smallest in the last-named species. 



The ductus communis choledochus enters into the small intestines 

 an inch beyond the pylorus in the first of these three specimens. In 

 it also the small intestines measure 73 inches in length, while in C. 

 diana they have a length of 60 inches, and but 52 inches in C. 

 cephus, although the last animal is the largest. The caecum in each 

 of the species is of the same simple cylindrical shape, but it is a 

 quarter of an inch longer in C. cephus than in the other two, in which 

 its length is H inch. The great intestines, including the caecum, 

 measure 22g inches in C. erythrogaster. For about 13 inches from 

 their commencement they are of equal diameter, viz. an inch ; then 

 they diminish to half that diameter, which continues onwards to the 

 anus. The sacculations formed by the constricting transverse fibres 

 are narrow and not at all prominent. The differences observed in the 

 great intestines of C. diana are these — their being half an inch 

 shorter, and the commencing wide portion also correspondingly of less 

 length than that already given of the new species. C. cephus has 

 the great intestines even 1 inch shorter than the last mentioned, and 

 their diameter is altogether somewhat greater than in either of these 

 Cercopitheci ; the more capacious portion towards the caecal end 

 is as much as a couple of inches shorter. 



The liver in C. erythrogaster is composed of five distinct lobes, as 

 in the two allied species. The right lobe is of moderate size, with a 

 thickish lobus caudatus situated at its base. The cystic lobe is rather 

 larger than the right lobe, and with the gall-bladder sunk into a 

 sulcus in its substance. The fourth lobe lies between the cystic and 

 left lobe ; it has a deep cleft or pit for the insertion of the round liga- 

 ment. The left lobe is rather smaller than the right, and is con- 

 joined with the main part of the body of the liver by a narrow neck. 

 The kidneys are each 1 \ inch long. There is nothing peculiar in 

 the other organs. 



The point of interest in the comparison of the viscera of the three 

 specimens referred to appears to be, that in some species of Cercopi- 

 thecus there is a variation in the size and length of the alimentary 

 canal ; but whether this corresponds to the minor grouping of the 

 species which some have adopted is a matter requiring more ex- 

 tended examination than the present imperfect observation affords. 



The morbid appearances observed in this specimen of Red-bellied 

 Monkey were miliary tubercles of the spleen, with hardening of the 

 pancreas and enlargement of the mesenteric glands. 



With respect to its habits during the two months it lived at the 

 Gardens, the following may be said : — Its nature appeared mild and 

 harmless, by no means grave or sedate, indeed rather inclined to be 

 lively and playful, but with little disposition to be quarrelsome. The 

 keeper noticed that it appeared timid, and somewhat distrustful of 

 its more romping companions, but freely approached him, and when 

 taking food out of his hand seemed pleased and gently played with 

 his fingers without attempting to bite. 



