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



epithelium reappears, extending farther down as the pylorus is 

 approached, until at length it replaces the pepsine cells, even at 

 the fundus of the tubes. In this respect there is, however, but 

 little regularity, since tubes may be met with not far from the 

 great curvature which are lined throughout with columnar 

 epithelium ; whilst, on the other hand, others occur near the 

 pylorus, which, for more than half their extent, are lined by 

 pepsine cells. "We constantly meet at the pylorus with many 

 (in some cases nearly all) of the gland tubes, both simple and 

 compound, but especially the latter, that are lined throughout 

 by columnar epithelium, in close proximity to others in which 

 the sides, and in part the fundus, of the tubes are lined with 

 pepsine cells, or next to those in which only the smaller part is 

 covered with columnar epithelium. 



In the newly born infant the columnar epithelium generally 

 extends somewhat farther than half-way down the tube. After 

 what has been stated above, it is impossible, therefore, to admit 

 that there is any such distinction of two kinds of gland tubes, 

 one lined by peptic cells, and the other with cylindrical epithe- 

 lium as has been represented by Henle,* Kolliker,-|- Bonders,* 

 and Leydig. Gerlach,|| some time ago, noticed that, although 

 the columnar epithelium extended to a greater distance down 

 the tubes near the pylorus than at the fundus, still glands may 

 even there be met with, the bottom of which is not covered 

 with this form of epithelial cell. MayerIF and even Henle** have 

 seen gland tubes in the pyloric region of the stomach of an 

 executed criminal lined throughout with peptic cells. The 

 wall of the glands found in the gastric mucous membrane is 

 structureless. Henlef-f observed in it, as well as in the mem- 

 brana propria of other glands, small stellate cells, which, in pre- 

 parations long macerated in chromate of potash, become smooth 



* Splanchnologie, p. 157. 



t Wilrzburger Verhandlungen, Band iv., p. 52. 



| Physiologie, Band i., p. 204. 



Histologie, p. 293. 



|| Gewebelehre, p. 303. 



51 Berichte der FreiMrgen naturwiss. Gesellschaft, No. 9, p. 147. 



** Loc. cit., p. 159. 



tt % Loc. cit., p. 46. 



