133 
ON THE OVULUM OF FLOWERING, OR PH/E- 
NOGAMOUS PLANTS.* 
1, Description of the ovulum in its various stages 
of development, up to the period of fecunda- 
tion. 
2. Description of the same organ, from the period of 
fecundation to its perfection as the seed. 
3. Detailed description of component parts, testa, ra- 
phe et tegmen—Nucleary membrane—Embryo- 
nary sac—Albumen—Embryo—Views of authors 
with regard to the coats, etc. to be noticed in their 
respective places, as well as anomalies. 
4. Description of the mode of fecundation, prefaced by 
an outline of formation of pollen—Changes con- 
sequent on stigmatic action on the pollen—On 
the stigma, etc. by pollenic action—Course of 
the tubes: mode of application to ovula—Views 
of late Authors—anomalies—Adaptation of means 
to ends. 
Memoranda, 
N.B.—With reference to the agency of insects. 
In Asclepiadee and Orchidez it might be said, parti- 
cularly with reference to the admirable means of adapta- 
tion known to Botanists, that nature had been rather 
clumsy. ! 
Instances of adaptation—Valisneria—subsequent develop- 
ment of anthers as in Parnassia, Asclepiadez, and Orchidez, 
—notice Nuphar, Berberis, and every other available in- 
stance divisible into those in which the whole male flower is 
brought into contact with the female, and those in which 
parts of different flowers are brought into contact. 
* Papers on the ovulum p. 133 to p. 181 partake of the character of private 
memoranda intended for the author's own use. They are now printed for the pur- 
e of preserving them, and not as exhibiting his complete views on the subject 
to which they refer, or even as having been once perused by him after they were 
itten. 
