206 &. A. BAUMGARTNER, M. T. NELSON, AND WM. DOCK 
tubular end pieces extending obliquely into the mucosa (fig. 5). 
One gland shows the two tubular branches running parallel to 
the surface of the lamen, as described above, with one end piece 
turning toward the muscular layer almost at right angles, and 
sending out two branches, one from each side, then dividing 
into two parallel tubular end pieces. 
Another gland is very much more complex. After the for- 
mation of the T-shape, one of the arms of the T turns sharply 
and divides, forming a Y-shape. One of the arms of the Y 
divides again, whereas the other arm, which is larger, gives off 
three pairs of branches and terminates in a cluster of five branches. 
The branching is decussate. Of the terminal cluster one short 
central terminus appears to be the continuation of the main 
stalk. The terminations usually point toward the muscle layer 
and show enlargements. 
Owing to a lack of material, we have been unable to model 
or describe the stages between a fourteen-year-old before puberty 
and the twenty-five-year-old nullipara of the interval stage. 
Of the latter, an area of attachment of about twenty-five glands, 
about 1 mm. by 1.5 mm., was modeled, which area includes one 
hundred and fifty sections 10 » in thickness. Some of the glands 
are grouped, four glands coming from one slight furrow in the 
mucosa (fig. 7). The others are all more or less isolated, but in 
quite definite rows. In studying the portions of the glands 
which lie next to the musculature, one is impressed with the 
fact that the glands give the appearance of running parallel to 
the surface of the lumen, and all in the same direction, and that 
the great preponderance of glandular tissue is in the outer third 
or half of the endometrium. The constricted necks of the glands 
are short, the stalks gradually enlarging as they extend obliquely 
toward the musculature. Some glands show constricted areas 
at intervals, others present a slightly spiral appearance, but 
only few show any branches until they are deep into the mucosa, 
when they all turn, more or less gradually into a direction at 
right angles to the one which they have just been following— 
a course nearly parallel with the surface of the lumen. 
