496 Edwin G. Kirk. 
not quite so deep, the mesoblastic cores of the processes being 
smaller. Many glands in the whole area C to 4 possess parietals, 
which in the part toward C are isolated, groups being often found 
toward 4. Thus cardia and fundus merge insensibly as yet, the 
fundus being as always, more precocious. The fundic glands, from 
about D to 4, present at 7 cm., the following measurements: The 
lumen depth® averages 25y; the process height, 35-40u. Mitoses 
now occur in the tubules, mostly about one quarter the distance 
from the surface, i.e., intheregion corresponding to the adult neck. 
‘At point 4 an abrupt change occurs, the glands from 4 to the 
pyloric aperture being almost twice as deep as the fundie glands, 
the average lumen depth being 40-50u, the process height, 
50-70u. The gland processes are broader (32—40u) than in the 
fundie glands. These pyloric glands also occupy the lesser curve, 
from the pylorus to point 7, where the pars oesophagea abruptly 
begins. The pyloric glands and processes are strikingly sym- 
metrical, the former having the form of simple tubes. Many 
mitoses are present at all depths, not so many on the surface. 
It must not be forgotten that in the cardia, fundus and pylorus 
longitudinal rugae occur, some running the whole length of the 
stomach. They are not so large as those of the caecum, but are 
readily visible with a hand lens. In the cardia, they are especially 
large (4-t mm. in diameter), and often papilliform or highly 
irregular. The caecal ridges are very high. 
Parietals now occur in caecum, cardia and fundus; in the latter, 
groups of them. We have seen that the first to appear, came to 
occupy only the deeper parts of the tubule. But now, in the deeper 
tubules (from 3 to 4, fig. 10) new ones are differentiated farther 
up along the sides, at first as single cells, which, by mitosis, soon 
give rise to groups in this new position. They never appear in the 
upper quarter of the tubule. 
At 7 em. the mucous cells have spread down to point 5 on the 
greater curve, the pyloric glands from 5 to 4, yet containing no 
trace of mucin. The boundary between the mucous and non- 
* For brevity the distance, fig. 6, from A to B will be called ‘ ‘lumen depth;” from 
A to C “process height.’ 
