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probable that the individual, of which the ovary will be described 
here, is a mature woman. The preparation bad several characteristics. 
First of all, it had a great number of ingrowths of the germinal 
epithelium, which covers the total organ as a single layer of cubic 
cells. These ingrowths are small tubes with a cylindrical round 
lumen, which is surrounded by a small number of bright, cubic cells. 
The nuclei of the ceils are lying almost in the centre of the 
cells. All the cells have about the same appearance. Most of the 
tubes are unbifurcated, only a few bifurcate. They generally do not 
proceed radially (towards the centre of the ovary), but very often 
they bend back under the germinal epithelium and proceed more 
or less parallel to the surface. Consequently one sees many rings of 
the epithelium under the germinal epithelium (transverse sections of 
tubes) in the sections. They are lying in the tunica albuginea and 
end, as far as I could see, blind. In the usual text-books of histology 
and microscopic anatomy these ingrowths of the germinal epithe- 
lium are not mentioned. But, in the text-books of veterinarian 
histology or those of embryology the occurrence of similar ingrowths 
in some animals and in human foetuses are mentioned. They are 
called “Keimschlauche” or ‘invaginations épithéliales”. 1 will describe 
them here as “ingrowths of germinal epithelium”, because a wrong 
idea of their genesis adheres to the name of “Keimschlauche’’. 
In the second place the ovary showed a large number: of cellular 
cords within the stroma. These cords are elongated and surrounded 
by a thin membrane of connective tissue and consist of very bright, 
regularly arranged, cylindrical cells (see fig. 1a). If they had a lumen, 
they would be exactly like glandular tubes. They have different 
names in the literature. The most usual one is ‘“Markstrange” 
(cordons médullaires). Therefore, I will call them in future “medullar 
cords.” The third and most obvious characteristic of the examined 
preparation is however the presence of a great number of abnormal 
eggfollicles. In many places, one sees the eggcells lying in groups 
and surrounded by a number of folliclecells, formed into, what is 
generally called “eggnests”. Besides these egenests ') in which I found 
as many as 9 eggcells, there were also vesicles (folliculi vesiculosi) 
with more than one eggcell. In those vesicles a large number of 
eumuli oophori, instead of a single one, occur (see fig. 1c and fig. 3). 
The greatest number I found was five. But beside the eggcells, 
which are lying in a real cumulus oophorus, one sometimes finds 
rudimentary eggcells in the vesicle. 
1) Eggball and eggnest may be used alternatively. 
