THE STOMACH. 391 



the neck and the f undus, which latter is the thickest portion 

 of the entire gland. In the neck we also find, in addition to 

 the cells already described, other corpuscles placed externally 

 to the former. . They are the parietal cells (Heidenhain), or 

 delomorphous cells (Rollett), the former variety being termed 

 chief cells (Heidenhain), or adelomorphous cells (Rollett), or 

 simply peptic cells. The parietal cells occur as spheroidal, 

 oval, or polygonal, rather opaque, sometimes very granular 

 bodies, which lie beneath the basement-membrane, but com- 

 monly outside the layer of ordinary chief cells. In the body 

 of the gland-tube we again meet with these two forms of lin- 

 ing-corpuscles. Here, however, the columnar or chief cells are 

 longer than in the neck, and their bodies generally appear 

 more transparent, while the nuclei, again spheroidal, are situ- 

 ated nearer the external than the internal border. Klein de- 

 scribes the substance of these cells as consisting of a delicate 

 reticulum, with a small amount of a hyaline interstitial sub- 

 stance in its meshes. The same author, also, invariably finds 

 an intra-nuclear network. Others have been less fortunate in 

 finding such appearances. The parietal cells of the body in 

 all respects resemble those of the neck. As the fundus is ap- 

 proached their number grows comparatively less. 



The pyloric glands, which some histologists insist on call- 

 ing mucous glands, are lined throughout by a single layer of 

 epithelium. This is composed of the ordinary columnar cells 

 of the gastric surface. But the corpuscles here appear to be 

 somewhat compressed, so that they seem less transparent than 

 elsewhere. They are known to undergo certain changes dur- 

 ing their passage from activity to rest. Examined in the 

 latter condition, we find them more granular, and apparently 

 smaller or shorter, than during and immediately after secre- 

 tion. These glands have long ducts, each one serving for sev- 

 eral secreting tubules. Their bodies are branched, and usually 

 appear somewhat tortuous. When such glandules become 

 somewhat more complex and grow larger (a change which nor- 

 mally takes place in the duodenum), they are called Brunner' s 

 glands. 



Dr. Edinger has recently (Archiv f. mikr. Anat., Vol. 

 XVII., p. 193) asserted that the gastric glands contain in 

 reality only one kind of cellular element. He based his 

 opinion on results obtained by treating the almost living mu- 



