22 CONIFER. 
greater portion of its cavity, its apex is most distinctly de- 
pressed aud discolored, the base of this part being rather 
constricted : no protrusion of the nucleus takes place. 
The opening of the envelope or the exostome communi- 
cates freely by a canal of moderate size with the cavity in 
which the nucleus is lodged. The apex of this latter being 
prolonged as it were into the canal. The vesicula occupying 
that part which is opposite to the union of the secundine | 
with the primine. ! 
The fasciculus of vessels appears on a longitudinal section | 
to run up between the outer and inner parts of the envelope, | 
or between the primine and secundine. "The base of the 
nucleus is confounded with that of the secundine. This 
body is free only superiorly, where it is half ovate, the 
apex being acuminate. The upper part consists of tissue, | 
dense and whitish, while that towards the base is yellowish. 
"The apex is membranous and transparent, marking the ex- 
cavated termination of a canal, which runs along the centre 
of the nucleus, nearly throughout its upper half. The apex 
is distinctly perforate, the base of this is truncate and filled 
with air and dislocated tissue. 
Towards the upper part of the base of the nucleus or ite. 
united part, there exists a large globular cavity. This is 
lined by a very fine membrane which may be detached, and 
then presents the form of a globular membranous bag. It 
is fil with mucilaginous, grumous and granular matter, 
having distinct cells intermixed. I should say that on 
separation, the granules and enclosed cells form a sort of 
membranous body, probably by attraction, see fig. 7. 
Six days after fertilization. No change with the exception 
of swelling that had taken place in the pollen, which was 
adhering to the outside of the ovule, after it had been applied | 
for several days. 
The pollen is frequently seen in the exostome, and in the 
' figured the membranous perforated apex of the nu- 
cleus contained many granules, from which no boyaux had 
