A Study of the follicular Epithelium frorn tlie Ovary etc. 635 
In sonie chambers a number of epithelial cells sbowed, at tbeir 
free ends, an enlarged swollen part which protruded beyond the normal 
margiu of the epithelium; these are found in chambers in which the 
oöcytes have not reached their maximum size and must not be con- 
fased with the processes many others have observed as present during 
the formation of the chorion. In tliis same end of the cell a part 
of the nucleus had either protruded or been pushed out with the cell; 
in either case the cell had all the appearance of one in which the 
nucleus was to be, in part, thrown out from it. In the nuclei of 
such cells a peculiar arrangement of the chromatin granules was noti- 
ced, those in the central part of the nucleus had collected in short 
rows or fused into rods; these were always darkly stained and they 
invariably pointed towards the median axis of the nucleus and its 
free end (Fig. 15). Whether this peculiar arrangement of the chro- 
matin granules has anytbing to do with the throwing off of part of 
the nucleus is hard to determine. A great many more nuclei with 
these peculiarly arrauged chromatin gramües were seen than those 
with a part of the nucleus protruded. These latter nuclei were found 
in certain chambers but they were not abundant. Whenever a pro- 
trusion of the nucleus was seen the contained chromatin granules 
were not the same as in the resting cells but in the form of beut or 
straight rods (Fig. 14); it was not possible to obtain a series showing 
the commencement and end of this peculiar process but the presence 
of these rods in protruded nuclei would lead one to believe tliat the 
arrangement of the chromatin as just described was connected in some 
way with wliat is believed to be a throwing off of part of the cell 
and nucleus. These nuclei showed a normal structure at both ends 
the peculiarly arrauged chromatin granules beiug restricted to the 
central part. 
Where secretion by Strangulation occurs in the alimentary tract 
of insects it is possible to find the cut off portions of the cells free 
in the lurnen of the mid-intestine. In the ovarian tubules tbere is 
no real cavity in the chambers and only in places a small artificial 
one where the oücyte has shrunken from the wall of the follicle; in 
all other places the wall of the oücyte is pressed against. the surfaee 
of the epithelium. If any part of a cell became cut off it would be 
fiattened out between tbe two opposed surfaces, oücyte and epithe- 
lium, and not easily seen; this does offen happen to the protruded 
ends of the epithelial cells, they being verv much fiattened. If the 
ends were cut off from the cells they would soon pass into the 
