REPllODUCTIVE CYCLE IN DASYURUS VIVEKRINES. 155 
Case 2 (vii . 06) PI. 7, fig. 6. Corpora lutea are present 
in the ovaries. They are at a stage towards the end of the 
growth period, and in their degree of development are inter- 
mediate between those of Case 1 and Case 3. 
The mucosa has a maximum thickness of 2’9 mm. Tlie 
uterine epithelium appears as a layer of quite low cubical cells 
(•006 — ’009 mm. in thickness), which essentially resembles that 
of a uterus seven days post-partum. Vacuolar spaces occur 
here and there in the epithelium, but the nuclei on the whole 
are plump and rich in chromatin and show no obvious signs 
of degeneration. It is therefore probable that the uterine 
epithelium has already been reconstituted. 
The uterine glands are in a very interesting condition, the 
appearances presented strikingly recalling those seen in the 
glands of post-partum uteri. Over the major portion of the 
thickened area of the mucosa, the basal portions of the glands 
are markedly convoluted and greatly hypertrophied but show 
no signs of degenerative change. They average in diameter 
*072 mm. (varying from *056 — *1 mm.), and are lined by an 
epithelium composed of very narrow, high columnar cells 
(*024 — *04 mm. in height), with small basally situated nuclei. 
The gland lumiua are distinct, but small, and in many cases 
contain a homogeneous secretion which stains deeply with 
esoin. The convolutions of the glands are very compactly 
arranged, with little or no connective tissue between them. 
Comparison of these hypertrophied glands with those of a 
pregnant uterus with blastocysts 1*5 mm. in diameter shows 
that whilst the gland convolutions in the latter are not so 
compactly arranged, the glands themselves are slightly thicker 
(•08— -*096 mm. in diameter, epithelium *032 mm.) and the 
gland lumina are much larger. 
In the more superficial region of the thickened area of the 
mucosa, as well as round its periphery, the glands and the 
portions of them situated therein present a very different 
appearance. They are much less convoluted and much less 
compactly arranged. Moreover, instead of possessing thick 
glandular walls and small lumina, they are lined by an 
