196 DEVELOPMENT OF THE OVULUM 
lined by the membrano-cellular embryonary sac, which is fix- 
ed by a broad base opposite to the hilum. It is within this 
that the albumen is developed, and within its neck, which is 
prolonged into that of the nucleus that the embryo first ap- 
pears. "The second coat is persistent, and subsequently 
becomes indurated : it is lined by the nucleary membrane, so 
that it may almost be said to consist of debris, only the 
albumen is contained within the embryonary sac, which is 
likewise very thin. No change takes place in the foramen 
uring the maturation of the seed. I at firstthought it obvious 
from this, that monocotyledones did not agree with my idea 
that the existence of albumen is always linked (except in 
cases where a vitellus exists,) with a membranous embryonary 
sac. But I subsequently found the embryonary sac to be 
membranous in this species, as may be seen fig. i. 
a. Just before expansion ; m, hilum. 
b. Shortly after expansion. 
c. Half of the testa, base of the second coat, and nu- 
cleus. 
e. Commencement of excavation. 
J. Embryonary sac developed. 
g. Sometime after marcescence of perianth. 
h. Long after. 
i. Embryonary sac shown to be membranous, its cellular 
appearance resulting from the development of cells 
in its interior ; embryo just appearing. 
 Suddyah : July \st, 1836. 
SPERMACOCE $p.—PLATE Lx1.—A, 
Spermacoce has its ovula but little developed. "They re- 
semble much those of Asclepiadez and Apocynee and Gen- - 
- tianez, but the groove, if it exists, can scarcely be ascertained 
to do so. Like the above they consist of a cellular mass, 
most probably due to the cohesion of the nucleus with the 
