8. A pollcn-mass of Ophrys apifera with its caudicula and gland
magnified 15 times; the gland is in the act of parting with the
fecundating matter of the pollen.
9. A view of the upper surface of the gland, with the mode of insertion
of the caudicula.
10. A view of the under surface of the same, shewing a cavity which
communicates with the foot of the caudicula.
11. A section of the pouch, shewing the positions of the gland, the
caudicula and the foramen.
12. A portion of the granules of the pollen-mass of Orchis mascula;
magnified 50 times. This shews that all the granulations cohere
by the means of a common elastic web, which is shewn forcibly
distended, and that each granulation is composed of a number of
series of particles of pollen.
13. One of the granulations in its natural state; magnified 100 times.
14. The same partially dissolved in water, its component particles separating
in threes, fours, pairs, and very minute simple molecules.
15. A back view of the double pouch of the column of Ophrys apifera
shewing the wide foramina at the back of each pouch for maintaining
the communication between the pollen-masses and the stigma;
magnified 15 times.
16. A section of fig. 1, shewing the relative position of the anther, pouch,
gland, stigma, and ovarium of Orchis mascula when the flower is
expanded.
NOTE.
At Mr. Bauer's request the following corrections are made in the letter
press of the first part of this work.
F R U C T I F I C A T I O N . TAB. I I.
For 19. The ultimate particles of pollen,
Read 19. A small portion of the fluid substance of the stigmatic gland,
which generally consists of very minute particles, intermixed with
rather large blotches of oil; magnified 200 diameters.
F R U C T I F I C A T I O N . TAB. I I I.
For 6. A pollen-mass with its caudicula and gland, taken out of the
anther,
Read 6. A pollen-mass with its caudicula and the internal socket of the
stigmatic gland.
Obs. This alteration has become necessary in consequence of its having
been found that the sentence, as originally constructed, might be
understood to imply that Mr. Bauer considers the gland of Orchidese
as belonging to the stamen and not to the stigma; a supposition
which is removed by the remainder of the plates illustrative
of the structure of Ophrydeae, and which is directly at variance
with Mr. Bauer's real opinion, as must be evident to those who
have studied the admirable drawings from which these plates have
been taken.
Add to 8. as follows :
This is in some measure an ideal figure to represent in what way
the fecundating matter is supposed to leave the caudicula and stigmatic
gland. For this reason there has been no attention paid to
preserving a proportion between the pollen-mass and the fecundating
matter; but the latter, which would really be invisible if the
former were not more highly magnified, is shewn as if the pollenmass
were magnified many hundred times.