. Cells of anterior end of impregnated embryo-sac (3). J. Same (2). 
PLATE I (continued). 
. Pollen-tube pulled out of the micropyle; one end remains in the 
papillary structure,’’ and the other is bulbous, has lost its granules, 
and the contiguous cells of the embryo-sac have come away with 
it (¢). 4. Bulbous end of pollen-tube (}). 2. Embryo-sac-cells. 
y. End of pollen-tube. c. End of pollen-tube, not yet become bul- 
bous, impinging on, and slightly pressing in, the cellular coat of 
sac (¢). 4d. Embryo-sac removed from nucleus. d, x. The position 
of the indentation by the pollen-tube (2). 
. Pollen-tube drawn out of the side of the ovarian cell-wall, and 
remaining in the micropyle-canal. 4. Tube drawn out of papillary 
structure, it being tight in the micropyle canal, twenty-four to thirty 
hours after application of pollen to stigma (4). 
. Terminal cells of pollen-tube; the empty cell has been drawn out of 
the ovule ; it is not bulbous. 4, c, d. Forms taken by terminal cell 
(3). 
e and d. Outline of embryo-sac after impregnation. wz. The position 
of contact with the pollen-tube ($). e. First trace of granular 
embryo in embryosac. 
. 2 
ain fa ——  nalpnimage abaya: 
