,576 MR. F. E, BEDDAED OX THE ANATOMY OF [May 26, 



that there is apt to be some variation in these loops, as I point ont 

 more particularly in the case of the Yizcacha (Lagostonucs tricho- 

 dactylus) and the Cape Hyi-ax {Hyrax ccqjensis). Of the latter 

 species I have examined an nnusnally large number of examples, 

 a fact which naturally gives me some confidence in detailing 

 the characteristics of the alimentary canal and mesenteries of 

 this interesting form. My notes refer to the Anthropoidea, the 

 Lemuroidea, the Hyracoidea, and the Rodentia, which I consider 

 in the order named. 



AXTHROPOIDEA. 



Of the Primates I only report upon two or three species, 



which happen to be remarkable in various ways. In the Gelada 



Baboon (Tlieroiyitliecus gelada, sometimes called Gelada rueppelli) 



the intestinal tract as well as other details in its anatomy have 



been described by the late Mr, A. H. Gai-rod*. In a male 



and female dissected by him^ the proiDortions between the 



small and large intestines differed greatly. In the male the 



colon was | of the length of the small intestine, in the female 



the proportion was much less, i.e., -f^ nearer to \. The example 



dissected by myself was also a female ; but the proportions in 



length of the two sections of the gut were much nearer equality, 



though I have, I regret to say, no exact measurements. The 



ascending colon from its very beginning (i. e., opposite to the 



entrance of the ileum) and a large portion of the transverse 



colon were attached to the great omentum. Moreover, the 



greater part of the ascending colon was bound down by a 



mesentery to the dorsal parietes. The colon had of course no 



fixed loops, which indeed do not occur among the Anthropoidea. 



In tiemnopitliecas melaloplius (a species of which the Society 



has possessed no previous examples) the small intestine was 



thrown into few wide and more or less fixed coils owing to the 



shortening of the mesenteiy. The colon was long, about double 



the length relatively of a Cynocephalus 2yorcarius examined for 



purposes of comparison on the same day. Its arrangement was 



remarkable. The ascending colon and a portion of the transverse 



colon were sacculated in the usual way along three bands ; and 



the greater portion of the descending colon was similar in its 



sacculation. Between the two, and corresponding to the greater 



part of the transverse colon, was a tract of uniform and small 



calibre entirely without sacculations. The omentum was attached 



to the mesocolon of the anterior sacculated region of the colon, 



but at a considerable distance from the colon. 



The cessation followed after an interval by the resumption of 

 a sacculation in the course of the colon, recalls a quite similar 

 state of affairs in the colic loop of the Rhinoceros sondaicus, 

 figured some years ago by Sir Fredeiick Treves and myself in 

 that animal f. Although the colon has not, as in Theropithecus, 



* P.Z.S. 1879, p. 451.' 



t Trans. Z. S. vol. xii. pi. xxxiv. figs. 1, 2. 



