SPOLIA NEMORIS. 93 
And so all these preparations leave no doubt that with 
respect to the connection between mother and foetus Nycticebus 
resembles ever so much more closely the Madagascar Prosimiz 
than it does Tarsius. 
However, there are differences between the Madagascar 
genera and Nycticebus that deserve special mention. Firstly, 
the maternal network in the former (Milne Edwards, 1. c., 
pl. 114, fig. 1) is much less decidedly reticular, and, on the 
contrary, more lamellar than what is here represented (figs. 38, 
51, 52, 56) for Nycticebus. Turner’s figs. 6 and 8 (also taken 
from Madagascar lemurs) agree very closely with those of 
Milne Edwards. Secondly, the outer surface of the fetal 
envelopes is very much the counterpart of the maternal ar- 
rangement, as can more especially be seen from Turner’s figs. 3, 
4, and 12; but also from Milne Edwards’ pl. 114, 117 (3), and 
118 (1). And in this respect Nycticebus presents the same 
phenomenon of concordance between the foetal excrescences 
and the maternal crypts, so that, instead of the lamelliform 
arrangement of the chorionic surface so conspicuous in the 
Madagascar lemurs, we here find circumscribed short columnar 
villi, each one of them fitting into a corresponding depression of 
the maternal reticulum. These columnar villi are quite equally 
distributed over the whole surface of the chorion, as is more 
particularly indicated in figs. 28, 31, 50, and 53. As preg- 
nancy draws to its close, these chorionic villi disappear on a 
restricted chorionic area, which covers the head of the foetus 
and is directed towards that side where the corpus uteri and 
vagina are situated. The maternal surface opposite this part 
of the chorion is similarly non-reticulated. A flattened pro- 
jection of the chorion, similarly without villi, is sometimes 
found attached to this anterior surface of the chorion. Both on 
the latter and on the projection here alluded to we find that 
the epithelial recesses, which will be mentioned lower down, 
are, all the same, preseut. The greater part of the chorion 
just before birth is, however, densely covered with the particu- 
lar villi that indent into the maternal reticular crypts. The 
transitional region between the areas is represented in fig. 55. 
