SPOLIA NEMORIS. 87 
more than once noted in the fresh animal before preservation 
by one of my correspondents, to whom I am indebted for most 
valuable material. 
Concerning the aspect of the internal genital organs of 
Tarsius when fresh and in situ, he tells me that the colour of 
the ovaries is often very different. Sometimes pink, they are 
at other times of a lighter and darker yellowish hue; and in 
young specimens they have the appearance of a small row of 
spherical or rod-like bodies of a light yellow colour. I have 
not yet found time to study the sections of the young stages 
of the ovaries thus characterised. 
The body of the uterus with its double horns of the pre- 
served specimens in my possession is extremely variable in 
shape according to circumstances. It is difficult to detect the 
very early stages of pregnancy at first sight. 
Yet long before the embryo has proceeded so far that the 
medullary groove has made its first appearance on the surface 
of the blastoderm, there is a very marked swelling of the 
uterine half in which the blastocyst has come to adhere. 
This uterine swelling is in no way perfectly spherical, but 
more saddle-shaped, in accordance with the fact that even in 
these early stages the blastocyst adheres to the maternal tissue 
in one particular region, and not along any more extensive sur- 
face, as, for example, in the shrew, the mole, the hedgehog, &c. 
The details of this process will be fully described elsewhere. 
I may here add that this early point of attachment corresponds 
in situation to what will, in a later stage, become the placenta, 
and that no omphaloidean attachment precedes as a temporary 
structure the definite placentary connection. 
When pregnancy advances it can be noted that the placenta 
does not occupy a varying but, on the contrary, a fixed position 
with respect to the different regions of the uterus. Itis always 
situated close to the apex of the horn on the mesometrical side, 
and the swelling of the uterine walls is not most conspicuous 
close to this point of attachment, but more towards the vaginal 
portion of the horn (ef. fig. 1). It is in this more extended 
part of the uterus that the head of the full-grown fetus is 
