STRDCTUHE OF THE MAMMALIAN GASTRIC GLANDS. 361 



The Structure of the Mammalian Gastric 

 Glands. 



By 



R. R. Bcnsl<;y,\^.A., M.B., 



Assistant Demonstrator in Biology, University of Toronto. 



With Plate 29. 



In a preliminary notice, published in the ' Proceedings of 

 the Canadian Institute/ vol. i, Part I, I gave a brief account 

 of some new points in the structure of the gastric glands of 

 mammals, which appear to afford a solution of the question of 

 the morphological significance of the pyloric glands. 



The view of Heidenhain/ Ebstein/ and Griitzner/ that the 

 pyloric glands are simply peptic glands without border cells, 

 and that the pyloric gland cells are identical with the chief or 

 central cells of the fundus glands, is no longer tenable. 



Heidenhain^ himself noted that in the fresh condition the 

 pyloric gland-cells are finely granular, whilst the chief cells of 

 the fundus glands are coarsely granular. 



Langley and Sewall ^ observed the same feature, but con- 

 sidered that the undoubted presence in the pyloric glands of 

 pepsin in small amount was sufficient evidence of their pepsi- 

 nogenic character. They concluded, therefore, not that the 

 pyloric gland-cells are diflFerent from the chief cells of the 



' 'Arch. f. mik. Anat.,' Bd. vi. 



» Ibid. 



' 'Pfliiger's Arcliiv,' Bde. vi and viii. 



* Herrmann's 'Handbuch d. Phys.,' Bd. v. 



* ' Journal of Physiol.,' vol. ii. 



VOL. 41, PAKT 3. — NEW SERIES. C C 



