230 INTESTINAL DIGESTION. 



border of the small intestine, which is contrary to the faulty 

 description of some recent authors. These patches, distin- 

 guished as Peyer's glands or patches, also as Agminated 

 glands Glandulae agminatse seu aggregatse consist of an 

 accumulation of small bodies, each resembling a glandula 

 solitaria in miniature, being also destitute of a natural aper- 

 ture. Colin (loc. cit.) states that they are first seen at a 

 distance of about six feet and a half from the pylorus, and 

 the least number of them he has ever counted has been 102, 

 whilst the utmost has been 158. 



The mucous membrane of the small intestine is thrown 

 into folds at different parts, which are transverse, and scal- 

 loped near the pylorus, whilst in other parts they are mostly 

 longitudinal; these are all temporary folds. There is 

 no such arrangement as the valvulse conniventes in the 

 small intestines of the horse, though recent writers have 

 described them. About five inches from the pylorus, at 

 the superior border of the duodenum, is a semicircular 

 fold, which, if elevated, admits of the finger being thrust 

 behind it into the wide biliary duct. The opening of the 

 pancreatic duct is also visible beneath this fold, but it is not 

 so capacious as the one last mentioned. 



Large Intestine. The large intestine constitutes the ter- 

 minating portion of the alimentary canal, being remarkably 

 more developed in solipedes than in any other of our domes- 

 tic quadrupeds. It occupies the greater part of the abdomen, 

 and most of it is loose, whilst its shape and other peculiari- 

 ties vary considerably at different points. 



It is divided into three parts ccecuni, colon, and rectum 

 the precise extent of each being defined by special anatomi- 

 cal characters. (See Fig. 92.) 



The structure of the large intestine does not vary es- 

 sentially from that of the small, as it possesses the four 



