128 BOTANICAL GAZETTE [AUGUST 
same. Each tip cell divides independently of the others, even 
when they are near together, and different stages of development 
are found in embryos from the same archegonium. Generally 
the tip cells are separated by the spreading or unequal growth 
of the suspensors. fig. 143 shows two embryos from the same 
archegonium, each with its own suspensor. In fg. 144 the 
embryo and suspensor shown are situated at a considerable dis- 
tance from any others. 
| figs. 140-142 are seria] sections through a group of embryos 
from one archegonium. There are four in the group, only three 
of which are shown. It will be seen that the growth in each 
proceeds independently, and some of them are more advanced 
than others. In fig. 739 a two-celled and a three-celled embryo 
are represented. The first wall is almost always inclined and 
produces two cells generally of unequal size. The second wall 
arises in the distal larger cell, and is nearly at right angles to 
the first. The following divisions cannot be systematized by 
any rule, but, as will appear from the figures, are irregularly dis- 
posed. /ig. 135 shows a suspensor bearing two embryos on its 
tip. It was teased from a prothallium and mounted whole. /ig. 
736 is amore magnified view of its tip; the two embryos are 
proceeding each on its own course in spite of the close contact 
of their original walls. In fig. rg6 the more advanced embryo 
seems to be formed of three distinct parts which may be inter- 
preted as derived from three separate tip cells which proceeded 
alone in their development for a time, but being closely associ- 
ated have united to form a single embryo. In fig. 145 4 single 
suspensor bears a single embryo. The embryonal tubes have 
appeared, but are not quite so much developed as in fig. 740. 
In fig. 747 is shown the most advanced stage obtained of the 
young embryo. The embryonal tubes are very numerous and 
extend about four times farther up than is shown in the figure. 
They have completely filled the space previously occupied by 
the suspensor, of which no trace can be seen at thistime. Three 
abnormal embryos are shown in figs. 130-132. 
From this description it will be seen that the development of 
the embryo of Taxodium differs from all other conifers. In 
