446 BOTANICAL GAZETTE [DECEMBER 
Fic. 113. Polar view of the above mitosis, showing 20 chromosomes. 
Fic. 114. Section of procarp showing situation of the carpogonium at the time 
of contact between the sperm and carpogonium nuclei. 
IG. 114a. The carpogonium of fig. rq under higher magnification; the sperm 
nucleus beginning to fuse with the female; no membrane observable around the 
sperm nucleus since the beginning of entry of it into the trichogyne; the female 
nucleus in resting condition. 
Fic. 115. Section of procarp showing carpogonium at a late stage in the fusion 
of the sential nuclei. 
Fic. r15a. The carpogonium of fig. 115 under higher magnification; the 
chromosomes of the sperm nucleus beginning to separate in the female nucleus; 
the network in female nucleus preparing to form chromosomes. 
Fic. 116. The fusion nucleus in the carpogonium after the female chromo- 
somes have been formed, showing a mingling of male and female; the total 
number of chromosomes js 40. 
Developinent of the cystocarp. 
Fic. 117. Section of anes at the time of the first mitosis of the fusion 
nucleus within the carpogonium. 
Fic. 117a. The eepcenia of ig. 117 under higher magnification, showing 
the first mitosis of the fusion nucleus 
Fic. 118. Procarp showing the Sint mitosis of the fusion nucleus in the carpo- 
gonium; cut obliquely. 
Fic. 118a. The carpogonium of fig. 118 under higher magnification, — 
a polar view of first mitosis of the fusion nucleus; 40 chromosomes prese 
Fic. 119. Prophase of a nucleus within the first cell of the carpogonial ok 
Fic. 120. Metaphase of the above mitosis. 
Fic. 121. Polar view of the same mitosis showing 20 chromosomes. 
Fic. 122. Anaphase of the same mitosis. 
PLATE XXV. 
Fics. 123a, 123b. Two sections of the fusion nucleus at metaphase of the 
first mitosis. 
124. Section of the procarp at anaphase of the first mitosis of the fusion 
Rebe within the carpogonium. 
Fic. 124a. The carpogonium of fig. 124 under higher magnificatio 
Fic. 125. Migration of one of two daughter nuclei FOS resulting 
from the first mitosis of the fusion nucleus, into the third auxiliary cell (compare 
with a3 in diagram 3). 
Fic. 126. Migration of two daughter nuclei (sporophytic) into the pericentral 
cell, the third auxiliary cell having fused with it; a nucleus from one of the aux- 
iliary cells below also entering the peticentral cell; the first, second, and 
cells of the carpogonial branch, together with the carpogonium, about to collapse. 
Fic. 127. Mitoses of two sporophytic nuclei derived from the fusion nucleus 
and of a gametophytic nucleus also within the central cell; the distinction between 
