578 
PEOF. W. TURNER ON THE PLACENTATION OF THE LEMURS. 
gravid uterus ; it then became more dilated, so that the mucous membrane was more 
expanded, but free from crypts. The mucosa of the non-gravid cornu was quite smooth 
and without crypts. The gravid left cornu, which measured inches from the summit 
of the fundus to the corpus uteri, was dilated and contained the ovum. The mucous 
lining in close proximity to the corpus uteri was smooth and free from crypts, but for 
the most part it was folded and subdivided into crypts, as in the other specimens of 
L. rujtpes. Extending, however, from the orifice of the Fallopian tube into the fundus 
was a smooth ovoid surface free from crypts, about 1 inch in its long diameter; and 
several elongated, depressed, smooth areas, in which the mouths of the glands were 
seen to open, were situated amidst and surrounded by the crypt-covered folds. 
The chorion was ovoid in form, inch long, and did not pass either into the corpus 
uteri or the cavity of the non-gravid horn. The broader end of the ovum was situated 
in the fundus uteri ; the narrower end came almost up to the corpus uteri. The surface 
of the chorion was almost uniformly villous, a small bare patch being situated at the 
pole directed towards the corpus uteri, whilst a larger non-villous patch was on the 
pole of the chorion, in apposition with the smooth surface of the mucosa in the uterine 
fundus. An occasional narrow bare patch also corresponded to the depressed smooth 
areas on the mucosa already referred to. It is clear, therefore, that the corpus uteri 
and non-gravid cornu do not become dilated in the earlier stages of development, and 
that the chorion only grows into them as the development of the foetus progresses. 
The proportion of villous chorion to non-villous in this specimen was considerably 
greater than in B, C, and D. 
Gravid Uterus of Indris brevicaudatus. 
This uterus, from its small size, was obviously the least developed of the specimens 
which had reached me. It was distinctly two-horned, and the right cornu was some- 
what bigger than the left. The distance from the os uteri to the fundus of the right 
cornu was l- x % inch, to the fundus of the left cornu 1 inch. Each cornu had attached 
to it a Fallopian tube, a round ligament, a broad ligament, and an ovarian ligament 
with its ovary. A corpus luteum was in the right ovary, and in close relation to each 
ovary was a pouch-like fold of the peritoneum. 
The cavity of the uterus was opened into by an incision through the posterior wall. 
The entrance to the smaller cornu was inch from the os, and the uterine mucosa up 
to that entrance, which formed the lining of the corpus uteri, was raised into longitudinal 
folds. The entrance into the more distended cornu was marked by a comparatively 
broad fold of the mucosa, which ran transversely around the greater part of the mouth 
of the cornu. The mucous lining of the distended horn was thrown into strong convo- 
luted folds, with deep intermediate sulci : the main direction of these folds was longi- 
tudinal ; but they were much more tortuous, subdivided, and prominent than those in 
the corpus uteri. 
Unfortunately I did not succeed in seeing the ovum in this specimen. Under the 
