98 BOTANICAL GAZETTE 
THE ARCHEGONIA. 
The number of archegonia varies from six or seven to aboit 
nineor ten. They are separated from each other by one or! 
layers of cells, and all open on the upper surface of the Nt 
lium (fig. 27). In the youngest stage found, the neck 
already cut off and had undergone a tangential division [j 
In the mature archegonia the neck varies greatly, both in 
and the number of cells (figs. 23-26). In one case more 
twenty-five cells were counted (fig. 26), or there may} 
two (fig. 23). Perhaps the most common condition is three tet 
of four cells each. Murrill (1900) has described considera! 
variation in the archegonium neck of Tsuga; and in Ta 
also there is much variation. : 
_ The jacket cells are not so dense as in many other 
- tine : of fertilization and after (fig. 37). 
___ tions between the jacket cells and archegonia were not! 
a they were not looked for by special methods, and may P 
| In the position and behavior of the ventral canal 
= Pod carpus agrees closely with Taxodium. No mem 
a formed : Separating a ventral canal ‘cell from the egg 
Poe nucleus is nk (fe closely pressed against the _ of 
ys ow —— egg puciees, but it ma! 
“opposite or above it, but always on the lateral wall i 
a directly under the neck cells. This retired position 4 
- bly been acquired to protect the ventral canal nu 
oS harm during fertilization, for, as we shall see, it is to 
a further, Both Strasburger (18 79) and Belajeft (1893 
the ventral canal nucleus of Juniperus i in a lateral p 
: Arla ( (1900, a) emphasizes the absence of such a membent in, 
= 
, Ar 30, 6) dine the presence of a ventral canal nucleus 
iis la a et ons ee 
