THE OVARIAN EGG. 289 
and the dark bodies, which have been till now the 
striking points, give way to the lighter spheres of 
albumen between which the clusters are scattered. 
Presently the whole becomes re-dissolved : these 
stages of the growth being completed, this little 
system of worlds is melted, as it were; but while 
it undergoes this process, the alouminous spheres, 
after being dissolved, arrange themselves in con- 
centric rings, alternating with rings of granules, 
around the Purkinjean vesicle. At this time we 
are again reminded of Saturn and its rings, which 
seems to have its counterpart here. These rings 
disappear, and now once more out of the yolk 
mass loom up little dots as minute as before ; but 
they are round instead of angular, and those 
. nearest the Purkinjean vesicle are smaller and 
clearer, containing less of oil than the larger and 
darker ones on the opposite side. From this time 
the yolk begins to take its color, the oily cells 
assuming a yellow tint, while the albuminous 
cells near the vesicle become whiter. : 
Up to this period the processes in the different 
cells seem to have'been controlled by the different 
character of the substance of each; but now it 
would seem that the changes become more in- 
dependent of physical or material influences, for 
each kind of cell undergoes the same process. 
They all assume the ordinary cell character, with 
outer and inner sac,— the inner sac forming on 
13 8 
