75 



Cercopitheci, although it now seems by general consent to be re- 

 garded as a Semnopithecus. From its existence in M. Otto's species, 

 and in the only two species of Semnopithecus wliich Mr. Owen has 

 had opportunities of dissecting, the latter gentieman is disposed to 

 consider it as appropriated to the genus, which may consequently 

 be now regarded as established on anatomical as well as on zoolo- 

 gical and geographical grounds. 



The stomach of the Entellus Monltey (taken from an individual 

 1 foot 8 inches in length from the mouth to the anus) measured 

 along the greater curvature, 2 feet 7 inches ; along the lesser curva- 

 ture, J foot : its greatest circumference was 1 foot and half an 

 inch ; its least circumference, 3 inches and two thirds. It may 

 be regarded as consisting of three divisions: ]. a cardiac poucb, 

 with smooth and simple parietės, slightly bifid at the extremity ; 

 2. a middle, very wide, and sacculated portion ; 3. a narrow elon- 

 gated canal, sacculated at its commencement, and of simple struc- 

 ture towards its termination. The latter, from its greater vascula- 

 rity and the more abundant distribution of the nerves of the eighth 

 pair, Mr. Ovven regards as the true digestive stomach ; the two 

 former divisions being rather to be considered as preparatory recep- 

 tacles. Mr. Owen described the several portions in detail, and 

 explained their physiology respectively, especiallj' with respect to 

 their fitness for pertorming a function analogous to rumination, He 

 remarked, hovvever, that while he referred to them, for the sake of 

 perspicuity, as three principai divisions, it was necessary to observe 

 that they are not characterized, likę the stomachs of Ruminants or 

 Cetacea, by any essential difference of structure, none of them pos- 

 sessing a cuticular lining. 



The stomach of the Croo Monhey had precisely the šame struc- 

 ture as that of the Entellus, but was smaller in proportion to the 

 size of the animal. The individual from which it was obtained was 

 much younger than the Entellus. 



Mr. Ovven referred to the displacement of some of the abdominai 

 viscera, particularly of the liver, in consequence of the great deve- 

 lopment of the stomacli. He also adverted to the length of the 

 intestines, and by a tabular view of the measurements in the two 

 Semnopitheci, in a Cercopithecus , and in a Macncus, he showed that 

 notwithstanding the complication of the stomach in the former 

 genus, the small intestines were proportionally longer than in the 

 other two ; the ratio being in Semnopithecus, eight to one ; in Cer- 

 copithecus, six and a half to one ; and in Macacus, four to one. 



The stomach of Semnopithecus was carefully compared with 

 that of the Kangaroo, and with that of the Sloth ; both of which 

 are well knovvn to be remarkable for their complication. These 

 were exhibited, as was also a preparation of the complicated sto- 

 mach of a species o{ Pteropus. 



In conclusion Mr. Owen inquired, what are the natūrai habits 

 and food of these sloui Monkeys, as M. F. Cuvier denominates the 

 Semnopitheci? Will they be found to resemble those of the Sloths? 

 Is their food more herbaceous than that of the Monkeys generally ? 

 This, he conceives, is highly probable ; and that the enlarged capa- 



