536 Franklin P. Johnson. 
of the parallel grooves is beginning to be lost, and the whole 
surface of the mucous membrane appears to be cut up by the 
network of anastomosing pits. The areas marked off by this 
network are slight elevations (much higher in the pyloric region), 
and have been considered by Brand as villi. Those of the fundus, 
however, are much broader and more irregular at their bases 
than the intestinal villi. Moreover, they have an entirely differ- 
ent developmentalhistory. It isdoubtful, therefore, whether these 
structures of the fundus can be considered as villi. The tunica 
propria, composed of developing reticular tissue, extends up 
between the pits to the surface epithelium. The surface epithe- 
lium iscomposed of a single layerof columnar cells, which are filled 
with mucous and contain at their lower ends oval or irregular 
elongated nuclei. The basal processes are not so elongated as 
in the preceding stage. At the bottom of the pits the cells are 
cuboidal. 
Gastric Glands. A view of the under surface of the epithelium 
at 120 mm. (fig. 12), shows the beginnings of the gastric glands. 
They appear as knob-like outgrowths from the bottoms of the 
gastric pits. As many as three glands are sometimes seen arising 
from a pit at the same level. The small buds are for the most 
part as yet simple glands, although several were seen which had 
begun to branch. They are of different lengths, the longest 
being about .048 mm.,and their diameters at the necks measure 
about .036 mm. The glands show small but well defined lumina 
and are lined by asimple cuboidal epithelium. The parietal (de- 
lomorphous) and the chief (adelomorphous) are easily distinguish- 
able. The parietal cells stain more intensely with eosin than do 
the chief cells, and their protoplasm is slightly more granular. 
Cross sections through the middle of the stomach at 187 mm. 
show the mucous membrane to be thrown into a number of large 
folds. The gastric pits are of about the same character as de- 
scribed for the 120 mm. embryo but they have increased in size. 
Some of the largest now measure about .089 mm. in depth. The 
surface epithelium is higher than in the preceding embryo and is 
composed of cylindrical cells which are mucous in character. The 
cells contain oval nuclei which lie in the lower halves of the cells 
