ANATOMY OF THE ALIMENTARY CANAL. 
479 
In the rat Beunnee’s glands begin very suddenly and are very much convoluted, while 
the stomach-tubes at the pylorus are short and straight. There seemed to be a difference 
between the epithelium of the lower part of the tubes of the pylorus and that of 
Beunnee’s glands. This difference was not met with in any other animal. In the rat 
I was therefore unable to trace the continuity of the stomach-tubes with Beunnee’s 
glands. 
In the monkey the coiled tubes of the stomach gradually breaking through the mus- 
cularis mucosa become continuous with Beunnee’s glands. There are, however, certain 
peculiarities in the intestine of the monkey, as small valvulse conniventes are found from 
its commencement. Beunnee’s glands are principally grouped in the submucosa of 
the valvulse. In this animal the glands are so much separated that in sections it can 
be seen that they are not acinous, but are composed of compound tubes. 
In man, sections were made from two cases obtained from the post-mortem room of 
persons dying after accident. It was found that the tubes of the stomach at the point 
of union with the intestine are placed obliquely to the line of the muscularis mucosa ; 
they penetrate that membrane and become continuous with Beunnee’s glands, as has 
been seen to be the case in other animals. 
Numerous lymphoid follicles were found at the point of union of the stomach and 
intestine in man, and they were found in that situation to some extent in all the animals 
which were examined. 
This lymphoid tissue has been shown to occur in very varying amount at this point 
of the alimentary canal in the dog, the mucosa being sometimes almost free from it, and 
at other times composed in a great measure of lymphatic follicles. This latter condition 
was found to be the case in dogs which were kept on a very low diet. I wish to lay par- 
ticular stress on these facts, as this great excess of lymphatic tissue may in itself con- 
stitute a pathological condition, and may be connected with some of those pathological 
changes so frequently met with in this part of the alimentary canal. 
Explanation of Plates 39-43. 
The outlines of many of the preparations were drawn with an Obeehaeusee’s Camera 
Lucida : in such cases the lens used with the Camera Lucida and the approximate mag- 
nification are given. The ocular and objective which were used in completing the 
drawings are also given. 
The preparations from which these drawings are made were hardened in chromic acid 
and alcohol, except where the contrary is expressly stated in the following explanations. 
Fig. 1. Haetnack ocular hi., objective 9, x550. 
Vertical section of part of a lymphatic follicle from the vermiform process 
