8 BOTANICAL GAZETTE [JANUARY 
no signs as yet of the disorganization that, according to STRAS- 
BURGER (18), they are to undergo. The protoplasm of the tip cell 
is somewhat less dense than the others, but not markedly so. The 
nuclei of this cell and the one above it, however, 
are much larger than the others, and the cells give 
every indication of being actively secretive. At 
this stage they have been driven some distance 
downward into the prothallial tissue, but instead 
of being crushed by the growth behind they seem 
to be opening the way for ae: 
the progress of the embryo. 
As I have not yet secured 
stages immediately following 
this, I cannot determine the 
ultimate fate of the tip cells. 
It is certain, however, that 
they persist for some time in 
healthy and active condition 
Fra. 20.—Slightly at the tip of the embryo. 
older proembryu; A much older embryo is 
suspensors elongat- represented in fig. 21. Above 
ing. May19, 19°3- the crumpled suspensors and 
X50. 
embryonal tubes three abor- 
tive embryos are seen. These are probably 
the products of three additional archegonia, 
as it certainly is not the normal thing for an 
archegonium to produce more than one em- 
bryo in Cephalotaxus. In none of the pro- 
embryos seen did the suspensors show signs 
of separating, as they do in many other 
conifers, and from the structure of the pro- 
embryo this does not surprise us. 
ARNOLDI (1) does not state definitely the _F1s- 2t-—Older embryo 
number of cell divisions before the formation of koa ep sets eS 
walls in the proembryo, and from his descrip- d 
tion one would suppose the cells to be arranged in more definite tiers 
than they actually are. As to the rosette, my observations agree 
with STRASBURGER’s (18), that the cells composing it are enclosed 
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