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1903] GAMETOPHYTES AND EMBRYO OF TAXODIUM 139 
Fic, 117. Archegonium with two-celled embryo near base; ventral canal 
nucleus in division above, and second sperm cell free in tip. X 280. 
1G. 118. Ventral canal nucleus divided, lying at base of archegonium in 
contact with two-celled embryo, only one of the nuclei of which is shown; 
embryo surrounded by its starch sheath. X 400. 
Fig. 11g. Late stage of fusion of sperm and egg nuclei. X 
Fig. 120. Spindle of first division of fusion nucleus; large plastin nucleo- 
lus unchanged, X 800. 
Fic. 121. Two daughter nuclei of fusion nucleus, immediately after 
division. X 800. 
Fic. 122. Preparation for second division. X 400. 
Fig. 123. Spindle of second division. X 800 
PLATE X. 
Fig. 124. Four-celled embryo; nuclei in usual position, two above and two 
below arranged tetrad fashion. X 280 
Fic. 125. Embryo of same stage as above, nuclei all arranged at base in 
one plane. x 280. ; 
Fic. 126. Spindles of third division ; plastin nuclei in protoplasm, X 280. 
Fic. 127. Eight-celled embryo, six cells above and two below ; the upper 
are dividing, the lower preparing to divide. X 280: 
1G. 128. Abnormal embryo, cut a little obliquely; two of the nuclei 
have not joined in the tier formation, but have remained a little distance 
above, and in dividing only one is shown; the other lies beside it in another 
section. X 280. 
IG. 129. Sixteen-celled embryo in three tiers; six cells in rosette, six 
suspensor Cells, and four below. X 280. 
eae 130-132. Abnormal embryos. X 280. 
. 133. Sixteen-celled embryo after suspensors have lengthened con- 
Masai <2 
Fig. 134. acess through a group of seven suspensors. X 400 
Fic. 135. A single suspensor carrying two embryos which are developing 
separately. X 29. 
F1G. 136. Tip of above suspensor with its two embryos more magnified. 
X 400. 
Fig. 137. A two-celled and a three-celled embryo, each on its own sus- 
pensor. X 280. 
PLATE XI. 
Fic. 138. Two four-celled embryos; there are four embryos in the group 
and four suspensors; three of the embryos are four-celled, and one about 
six-celled. x 280. 
Fic. 139. A three-celled and an about eight-celled embryo ; four embryos 
in group and three suspensors. X 280. 
Figs. 140-142. Three consecutive sections through a group of four 
