136 
in the cells (fig. 64), I dare not deny it decidedly, as it is in reality very difficult 
to convince oneself of the absence of anastomoses between the chromatophores, 
which never run quite regularly. According to Kyzix (1. c. p.115) the chromato- 
phores contain small granules which are interpreted by him as pyrenoids. I have 
observed the same granules but cannot give any information as to their nature: 
their appearance seemed not to be constant. While the cells in LEHMANN’s spec- 
imens contained fat and no starch, I found in cystocarp-bearing specimens the 
vegetative cells containing no fat but minute starch-grains staining red-brown in 
iodine, and the cystocarps, especially the carpospores, contained a great quantity of 
the same substance. The reaction with iodine was rather similar to that of glycogen. 
L The sex-organs develop, as shown by GRAN, on 
| special fertile branchlets, generally very near each 
other. Later, Kyzin has accounted for the various 
combinations of the sex-organs on the same branch- 
let, but he has not noticed the curious fact that 
the carpogonia are not always lateral on the fertile 
branchlet but often intercalary, rising by transfor- 
mation of the second or even the third cell from 
the top. The intercalary carpogonia, which were 
already observed in 1893 by the late Professor 
Fr. Schmitz who mentioned them in a letter to 
me, are very common. À very frequent case is 
represented in fig.62 A, C, D where the lower cell 
in a two-celled branch has become a carpogonium, 
pushing forward a trichogyne from the upper end 
of the cell along the upper cell which in all cases 
is sterile bearing two antheridia. In fig. 62 B both 
Fig. 62. the cells have developed into carpogonia, the one 
rer re Bee ee superposed on the other. In fig. 62 G the carpo- 
produced by them after fertilisation are gonium has arisen from the lowest cell in a three- 
shaded. 4—D 0:1. E 30:1. FH: celled branched branchlet, and in fig.62 E and F 
they are lateral. In the same branchlet a lateral and a terminal carpogonium 
frequently occur. The intercalary carpogonia show very often a swelling at the 
base of the trichogyne (fig. 62 D) which may formerly perhaps have been inter- 
preted as the whole ventral part of the carpogonium. Fertilized carpogonia with 
adhering globular spermatia frequently occur. After fertilization the separation of 
the trichogyne takes place in the intercalary carpogonia at the upper end of the 
swelling (fig. 62 G). Thereafter the fertilized carpogonium increases in length, the 
trichogyne is pushed aside, and the lengthened body divides by a transverse wall 
a little under the insertion of the trichogyne (fig. 62 E, F, H). Even in this stage 
and later the trichogyne with adhering spermatium may yet be visible. In fig. 62 H 
the primary filament of the young cystocarp is three-celled and has produced a 
