JlOXOGRAI'll OF THE I.ABOULBENIACE-T:. 210 
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outward (fig. 9), and by tlie fbruiation of a septnni is soon divided (fig. 10) into an 
upper and a lower cell [d and c). From the upper of lliese cells, uliioli may be 
called the priinofdial ail of the procarpr, is formed the whole of the femnle sexual 
organ, while from the lower (c), which may be similarly called the jiiiiiiordidf cilJ of 
the j^cnlhccium, are developed the cells which form (he perilheciiiin proper. This 
lower cell (c) is the fiist to show further signs of development, and becomes divided 
by a more or less obliquely longitudinal septum (fig. 11) into two cells (c" and c). 
The cell [c") then begins to grow upward, and becomes divided into an up[)cr and a 
lower portion, fig, 12 [z) and [p). Tlie lower cell (fig. 12, ^>) con>.litutes the "stalk- 
cell," while the upper continues to divide, as will be presently described. The cell 
(c') of fig. 11, on the other hand, becomes separated into two upper cells (fig. Vl,i,i), 
lying on opposite sides so that only one is shown in the figure, and a lower cell (h), 
which may be called the secondary stalk-cell. The cell (2) and the cells {i, i) then 
continue to grow up around the base of the cell {d), the primordial cell of the procarpe. 
One of the cells (/, i) then becomes separated into a single lower and two upper cells, 
while the other becomes separated into a single lower (figs, 13, 0) and a single upper 
cell (h), as also does the cell {z); the cells (0') and (??) of fig. 13, resulting from its 
divisions. There are thus formed three proper basal cells of the pcrlthecium, two an- 
terior (<?, 0) and one posterior (0'), but twO of which are shown in the optical section 
(fig. 13), and from them four cells are separated above which continue to grow up- 
ward and surround the cell {d), the base of wliich is now (fig. 13) completely enclosed 
and has become separated by a cross partition as the cell (/) from the part [c) whicl 
still remains free above it. 
We then have this basal part (fig. 13) constituting a central cell (/), distinguished 
from the free part above [e) by a cross partition, and completely surrounded by the 
seven cells (0, and n, n), but four of wliicli are, of course, shown in the optical sec- 
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tion. The central cell (/) then remains without further development until fertiliza- 
tion has taken place ; the terminal portion of cell (e) in the mean time becomes 
separated from the part below (fig. 14, e") as a usually very small cell (t% which im- 
mediately begins to produce a terminal .outgrowth, the young trichogyne. This 
small cell is more marked in the genus illustrated thin in most others in which it is 
not, as a rub, so clearly distinguished ; the filamentous portion usually growing 
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directly from the apex of cell [c], from which it is separated by a septum (Plate II, 
fig. 2). Cell {e) and the projection {(r) from it must therefore be considered as con- 
stitutimT to"-ether the trichogyne proper. As the latter develops, the cell (c) becomes 
less well marked, while the filamentous portion reaches a development that varies in 
