A Study of the follicular Epithelium from the Ovary etc. 
629 
oöcytes nearly all that arc present being restricted to that part wbieb 
Between tbe youngest 
Fis-- A. 
in the section we could call tbe corners. 
oöcytes, as also between eacb oue and tbe 
wall of tbe tubule, there is a tliin layer of 
cytoplasm wbieb belongs to tbe nuclei in tbe 
corners giving a number of very much flat- 
tened cells part only of whose boundaries 
cau be distinguisbed. 
Such an arrangement as we have just 
described is found around tbe youngest 
oöcytes altbougb they are not as yet sur- 
rounded by wbat would appear as a complete 
epithelial layer. Tbe number of oöcytes 
having tliese epithelial nuclei at tbe corners 
only and not at tbe sides differs in various 
tubules; in some tbe first oöcyte to be com- 
pletely surrounded by a distinct layer of 
cells was tbe tbird from the end chamber 
while in otber tubules it was as far down 
as tbe fifth. Here and there other epithelial 
nuclei besides tbese in the corners are seen, 
they occur but seldom; when present they 
are more apt to be found somewhere on tbe 
outer surface than between the oöcytes. As 
noted, a few scattered nuclei may be pre- 
sent around tbe youngest oöcytes before a 
complete layer is formed; when such are 
found at the sides of tbe oöcytes eacb nucleus 
lies with its loug axis parallel to the surface 
of the oöcyte, while tbose in tbe corners bave 
no definite Orientation (fig. 2 VI). Eacb epi- 
thelial nucleus contains from one to tbree 
nucleoli and a number of cbromatin granules 
imbedded in a reticulum. When a complete 
follicular layer is formed its cells surround 
tbe oöcytes on all sides, but, between neigh- 
bouring oöcytes, there are only a few flat- 
tened cells. The nuclei of tbe regularly arranged cells at tbe sides 
are smaller than most of those lying in the corners, Daiber (6), and 
all lie flat against tbe oöcyte (Fig. 2 VI). Tbese epithelial nuclei 
An ovarian tubule of Diapbero- 
mera before tbe oldest oöcyte bas 
enlarged. 
