
190 DEVELOPMENT OF THE OVULUM 
At the time of fecundation this is the only portion of it 
visible, the outer coat adheres slightly to the nucleus, which 
is apieulate; the point cellular, scarcely projecting beyond 
the foramen. At this period the membranous embryonary 
sac is fully developed, and is attached to both ends of the 
nucleus. Soon after, the embryo is visible, occupying the 
axis of its apex. The nucleus is at this time reduced 
(except its base, which remains thickish) to a very fine mem- 
brane adhering to the outer coat. The albumen is developed 
round the embryo. A little later, and the embryo has become 
lateral. The cavity prepared for it being much larger than 
itself, and extending half-way down, and bounded on one side 
by the integument, on the other by the albumen. The sub- 
sequent changes will be at once understood, but it is difficult 
to comprehend the cause of the unequal deposit of albumen, 
to which I am inclined to refer the change of situation of the 
embryo. The raphe is visible at the time of expansion, but 
not much earlier. 
a. Before fecundation. 
b. During fecundation. 
c. Embryonary sac with base of nucleus. 
d. After fecundation of embryo. 
e. More advanced, embryo commenced to be pushed to 
one side: 
J. Early period, sometime before expansion. 
Suddyah : 13th June, 1836. 
STYRAX sp.—Puate xivit.—Fie. 2. 
1. Longest section of ovule sometime after fecundation, the 
nucleus and testa adherent : abundance of spiral vessels being 
interposed. Superficies of nucleus green. The excavation is 
large, and communicates with its apex, it appears to be lined 
by a sort of membrane, but probably this is merely owing to 
the tissue of its parietes being in a state of decomposition. 

