} 
MOXOGRAril OF THE LABOULBENIACE^f:. 221 
In brief, then, we fjiid the reniiile organ developed at fir.-^t as a laferal outgrowth 
from one of the cells of the receplacle. From thifs outgrowth a tcMininal and a Pub- 
terminal cell are cut ofF. From tlie former of thofc hy further division is jiroduced 
the procarpe, consisting of a terminal receptive j)orlion, the triehogjnc, a middle con- 
necting portion, the trichophoiic cell, and a lower essential i)ortion, the carpogenic 
cell, which alone develops further; while from the laHer arises hy further division i]\e 
whole of the perithecium j^roper. The subterminal cell thus forms the basal and 
} wall-cells of the perithecium, while the terminal one, although at first rpiite free, 
forms its contents. 
The further development of the young perithecium after the fertilization of the 
trichogyne may be also best illustrated by reference to the same series of figures of 
Stigmatomyces (Plate I, figs. 17-24). In fig. 17, which represents a condition in 
f( 
as been completed, the procarpe remains unchanged, except 
'/) has become somewhat enlarged and elongated. In fig. 1^ 
first indications of development 
the carpogenic cell, which, through the 
formation of two transverse partitions, has become divided into three superposed 
cells, while the trichogyne has begun to wither. As a rule, however, it has entirely 
disappeared when the first divisions of the carpogenic cell are visible. In fig. 19, this 
division of the carpogenic cell has become still more pronounced, and nothing remains 
of the trichogyne but its insertion. Disregarding the accompanying development of 
the wall-cells of the perithecium, and following only the divisions of the carpogenic 
cell, we may distinguish the three cells into which it first divides a«» follows: the 
lower of the three {is) may be termed the inferior svpporiiiig cell, while the upper con- 
stitutes the superior supporting cell {s s). The remaining cell, wliicli lies between the 
ay be conveniently termed 
R 
of the thr 
mtually d 
which undergoes any further develoi)ment ; the two supporting cells 
appearing entirely. Up to this point the development of the procarpe is similar ir 
all the genera, so far as they are known ; but the further divisions of the ascogoniun 
show^ certain variations in different genera and even, apparently, in different speci 
mens of the same species, although it is improbalde that individual variations of thi; 
nature are at all common. In the present instance the ascogonium 
lower and an npper portion, the latter at the same time dividing, by somewhat irregu- 
larly longitudinal septa, into four cells. The lower portion (figs. 20-23, is t) remains 
d 
changed, being eventually destroyed 
y be called the secondary supporthirj cell. \^ 
pporting cells {ss and is), and 
then the ascogonium dividing 
ily into fi 
of them, the secondary supporting cell, remaining 
Ik 
