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Show 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 comparatively 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 1^ inch. The great intestines, including the caecum, measure 22| 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 csecal 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 ligament. The left lobe is rather smaller than the right, and is conjoined with the main part of the body of the liver by a narrow neck. The kidneys are each 11 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 Cercopithecus 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 extended 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. |
