SPOLIA NEMORIS. 95 
give the exact relation of the maternal and the embryonic 
parts in a section through chorion and uterine wall. Of the 
latter, muscularis and mucosa are indicated in fig. 40, the 
elevated ridges of the mucosa that form the peculiar reticulum 
referred to being visible as so many inward projections. They 
are all covered by an epithelium which even in this far advanced 
stage can be readily distinguished. Immediately below this 
epithelium numerous finely branched maternal blood-vessels 
take their course, in every respect comparable to those which 
both Turner and Milne Edwards have made out by injections 
for the Madagascar Lemuroids. 
The chorionic villi of Nycticebus are seen to fit very exactly 
into these cryptiform spaces; it is worthy of remark that the 
epithelium on the villi is in many places ever so much thicker 
and more considerable than what is found on the opposite 
maternal surface. 
In the villi numerous embryonic capillaries take their course 
immediately below the epithelial layer. The two vascular sur- 
faces are thus separated only by the thickness of two cell-layers, 
of which the maternal one is less high and less columnar. 
The above-mentioned recesses (#.)in the chorion are clothed 
by a direct continuation of the chorionic epithelium. Smaller 
vascular villi with a much less massive core of connective tissue 
stand out into the lumen of these recesses, as can be seen both 
in fig. 89 and fig. 40. 
The amnion which enshrouds the foetus has been partly 
removed in fig. 30, and is partly folded back (after removal 
of the foetus) in fig. 82. Also in figs. 36 and 54 it has been 
dissected away, whereas in these two latter figures the connec- 
tion between the foetus and the villiferous chorion by means of 
the umbilical cord is still retained, the chorion being partly 
inverted in the act of stripping off the embryo. 
In the preparations here figured no indication is given of the 
yolk-sac and the allantois. In Milne Edwards’ figures of 
Madagascar lemurs a very conspicuous place is allotted to the 
allantois, which he has inflated, and which thus showed digitate 
processes and a multilobulate shape. It is thus described as 
