14 Veir BrecHer WIrtrRock. 
One of these deviations consists im the fact, that the passing of the 
chlorophyll is begun and even completed without any previons enlarge- 
ment of the upper part of the mother cell of the spore. The spore 
formed in this manner is not cask-shaped, but cylindrical; with its top 
rounded like a cone, if it is a terminal spore. Spores of this form are 
very often found in P. sumatrana (v. Mart.) nob. and in P. polymorpha 
nob. (pl. 1, fig. 2 and 13), and not seldom in P. Zelleri (v. Mart.) nob. 
and P. Roettleri (Roth) nob. They are more rare in P. Cleveana nob. 
(pl. 2, fig, 13); and in P. equalis nob. they would seem not to occur. — 
The other deviation is, that not the whole chlorophyllaceous contents of 
the mother cell of the spore passes into the nascent spore, but a rather 
considerable part of it remains in the subsporal cell. The chlorophylla- 
ceous matter, which has remained in the subsporal cell after the for- 
mation of the (first) spore, does not, however, continue in this cell, but 
is used to form a new spore below the first. This is done in exactly 
the same manner as in the formation of the first spore, only with the 
difference, that the enlargement of that part of the cell which is in- 
tended for a spore does not take place or is hardly perceptible. The 
two spores that have been brought forth in this manner by the same 
original mother cell, and which are placed beside each other, may be 
called twin spores. Such twin spores are regularly found in the prin- 
cipal filament (pl. 1, fig. 10, 11) and not seldom in the branches of the 
list degrée an P. Zellerd (vy. Mart.) nob. (pl. 1) fig. 9s jandiisiiges 
in this species the formation of the second spore fails in the principal 
filament, the subsporal cell shows its creating power by forming instead 
anormal branch near its top (pl. 1, fig. 9 sb). Accidentally, twin spores 
occur in P. Cleveana nob. (pl. 2, fig. 14 and 15 s’, s”), P. polymorpha 
nob. (pl. 1, fig. 16), P. Roettleri (Roth) nob. (pl. 1, fig. 19, 20) and 
now and then even in P. kewensis nob. (pl. 3, fig. 8 s’, s”). In P. Cleveana 
nob. I have even found, twice or thrice, three spores in a row, brought 
forth by the same original mother cell (pl. 2, fig. 15 s*, s*, s*). These 
may, therefore, be called triple spores. — The third deviation from the 
regular process of the spore formation is, that the mother cell of the 
Spore, mistaking, as it seems, the direction of the increase, forms the 
‘) In one case, represented pl. 2, fig. 10, I have found in this species one 
more deviation: the lower of the twin spores, marked s”, has, after the protoplasm 
has contracted, surrounded itself with a quite new membrane, instead of using that 
' of the mother cell as far as possible, 
ans 
