584 THE INTESTINAL CANAL, BY E. KLEIN AND E. VERSON. 



kiihnian follicles are connected with each other by a few 

 transverse fibres. These may be constantly seen around the 

 orifices of the follicles immediately below the surface of the 

 mucous membrane. 



The lymph follicles of the mucous membrane of the 

 Rectum are of the solitary variety, and comparatively few in 

 number. In their general characters they resemble those of 

 the other portions of the large intestine. It is deserving of 

 notice, however, that in the child I met with isolated masses 

 of adenoid tissue below the sigmoid curvature imbedded 

 amongst the interweaving fibres of the circular layer, or lying 

 between these and the longitudinal layer of muscular fibres, 

 which were continuous laterally with the interfibrillar con- 

 nective tissue of the muscular tunics. It remains to be 

 established, however, whether these perform the same functions 

 as the true lymph follicles. 



At the thickened portion of the mucous membrane the 

 Lieberkuhnian crypts appear to be elongated, their length 

 being as much as O6 and 07 of a millimeter, whilst they may at- 

 tain to 007 of a millimeter in breadth. In the newly born child 

 they have a height of about 0*3 of a millimeter and a breadth of 

 about - 05 of a millimeter. The only part of the surface on which 

 they are not found is that over the lymph follicles, on which ac- 

 count the latter appear to be depressed, and can only be recog- 

 nised with the naked eye as punctiform hollows. Elsewhere 

 the crypts are situated in close apposition. They cease in the 

 region of the Columnse Morgagni, in the lowermost part of 

 which a few sebaceous follicles already begin to be visible. 



The epithelium of the large intestine, in conclusion, pre- 

 sents no points of difference from that lining the small, and 

 like it possesses a striated hem or border. I have, at least, 

 ascertained this to be the case in man, the dog, cat, rabbit, 

 guinea-pig, rat, and frog. Near the anal orifice, however, 

 numerous roundish cells constantly make their appearance be- 

 tween the columnar or conical ones, but this also occurs in 

 many parts of the small intestine. Jhe latter preponderate in 

 number only as far as the Columnse Morgagni, where they are 

 gradually replaced by several layers of rounded succulent cells 

 the most superficial of which become more and more flattened 



