PROF. W. TURNER ON THE PLA CENTATION OP THE LEMURS. 
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in close apposition with the uterine raucous membrane. On gentle traction the chorion 
could be raised from the mucosa, the ridges on the chorion being drawn out of the sulci 
and the villi out of the crypts, so that the foetal and maternal parts of the placenta could 
be separated from each other without any structure having to be torn through. 
In all three specimens the free surface of the uterine mucosa was elevated into folds 
in a considerable part of its extent, though they were not quite so prominent as in Pro- 
pithecus. Both the folds and intermediate sulci were pitted with multitudes of crypts. 
The mucosa in the posterior third or fourth of the uterus, extending back to the os, was 
for the most part smooth and free from crypts. In C a smooth band also extended from 
the os as far as the non-gravid horn, the mucous membrane of which was also for the 
most part smooth and free from crypts. A similar smooth patch of some size was seen 
on the mucosa lining the gravid horn, extending into that cornu from the orifice of the 
Fallopian tube ; in C this smooth surface was ovoid in form, and measured 1 inch by 
To inch ; in B and D it was almost circular, and about 1 inch in diameter. But, further, 
irregularly elongated, depressed, smooth areas, about equal in number and size to those 
described in Propithecus, were scattered within the folded crypt-covered part of the 
mucosa. These areas were quite free from crypts, and did not have so tense and 
puckered an appearance as in Propithecus. The arrangement and structure of the crypts 
themselves so closely resembled what I have described in Propithecus , that it is unneces- 
sary to repeat the description. 
The mucosa of Lemur rujipes, from being thinner and more translucent than that of 
Propithecus , was peculiarly well fitted for the examination of the arrangement of the 
utricular glands. When the free surface of the membrane was examined under low 
powers of the microscope, the tubular glands were readily seen lying beneath the crypts, 
but very much fewer in number than the crypts. A few of the glands were very 
tortuously arranged, but more usually they were almost straight ; they occasionally 
bifurcated in their course, and at times gave origin to short diverticula. None of the 
glands was seen to open into a crypt. The glands situated beneath the crypts converged 
in a very remarkable manner to the smooth areas of the mucosa already described, and 
as a rule the tubes became quite straight, though occasionally a tortuous gland was seen 
beneath the smooth part of the membrane. The straight tubes ran obliquely for a 
greater or less distance beneath the smooth area, gradually approaching the surface, on 
which they opened by annular mouths. Ten, twenty, or even a greater number of 
glands, varying with the extent of the surface, were seen to open on a single smooth 
area. Usually the glands opened by independent orifices; occasionally two glands 
joined together immediately before reaching the free surface, and still more rarely three 
glands joined and opened by a single large mouth ; as a rule, the orifices were directed 
obliquely to the surface, and bounded by a slender fold of the membrane. The mouths 
of the glands were often arranged in groups of five or six, and between adjacent groups 
were patches of smooth membrane in which no openings were visible. 
Straight and tortuous glands were seen in considerable numbers beneath the smooth 
