OF THE INTESTINES. 253 



of chyle, to little loose pendulous bags, internally soft 

 and spongy ; but, when distended with chyle, they have 

 the appearance of a morel. 



409. The base of these villi is surrounded by in- 

 numerable glandular follicles, adhering chiefly to the 

 nervous coat, and opening into the intestinal canal 

 by a very small orifice, through which they dis- 

 charge the mucus that lines the whole tract of the 

 intestines. 



These are distinguished into three orders. The Brun- 

 nerian, largest, distinct, found in most abundance in 

 that part of the duodenum which is contiguous to the 

 pylorus.* The Peyerian, smaller, aggregated, found 

 chiefly at the termination of the small intestines, — about 

 the valve of the colon. f Lastly, the Lieberkuhnian, 

 the smallest, said to be distributed in the proportion of 

 about eight to each villus.^ The two former orders 

 are so inconstant, that I am inclined to consider the 

 view given of them in the plates alluded to, as morbid ; § 

 for I have more than once been unable to discover the 

 slightest trace of fungous papillae with a single pore, 

 in the small intestines of healthy adults ; while, on the 

 contrary, in aphthous subjects, I have found nearly the 



C. A. Rudolphi, Anatomisch-physiologische Abhandlungen. Berlin. 1802. 

 8vo. p. 39. 



* J. Conr. a Brunn, Glandulce duodeni s. pancreas secundarium. Frf. 1715. 

 4to. fig. 1. 



f J. Conr. Pcyer, De Glandulis intestinorum. Scafhus. 1677. 8vo. espe- 

 cially fig. 3. 



X Lieberkiihn, 1. c. p. 17. tab. iii. 



§ The eminent Rudolphi thinks differently, 1. c. p. 212. 



