457 
(fig. 417, comp. FALKENBERG p. 597). As regards the development of the spermatia 
reference may be made to Kyrın’s paper (1914, p. 55 pl. 3 figs. 13—18). 
The procarps arise in the second joint of the trichoblasts (fig. 418, comp. K. R. 
1903 p. 459, Kyrın 1914 p. 42). The sterile upper part of the latter remains for a 
shorter or longer time at the upper end of the developing cystocarp; it may still 
be found sometimes in the ripe cystocarp (fig. 419). It may be simple or branched. 
The development of the procarp and the cystocarp has been described at length 
in the important papers of Kyrın 
(1914 pp.41—54 and 1993 p.114). N 
The tetrasporangia arise in \. AW 
short branches forming small tufts AS EA 
at the ends or on the sides of the 
long shoots, the latter principally 
in the f. virgata, two in the same 
joint, in a number of consecutive 
joints. In the lower part of the 
branch, under the first lateral or- 
gan, they are arranged laterally, 
to the right and to the left of the 
median plane. The first trichoblast 
is inserted over one of them. In 
the joint following after a tricho- 3 
blast (or a branch) the sporangia Rhodomela subfusca f. REN N, section of tetra- 
are arranged ina similar way to sporiferous joint before division of the sporangia. B, tetrasporiferous 
“ie Night eral ee i 
the orientation of the sporangia is 
thus constantly changing in the trichoblast-bearing region. The pericentral cells, from 
which the sporangia are produced, are first divided by two oblique walls by which 
two cover-cells are cut off (comp. KyziN 1914 fig. 11). These cells are shorter than 
the mother-cell, the lower part of which therefore is free outwards and which after- 
wards is divided by a horizontal wall into two cells, the upper of which becomes 
the sporangium. The lower cell, the stalk-cell, is then divided by one or two peri- 
clinal walls cutting off one or two shorter peripheric cells that cover the stalk-cell. 
The other pericentral cells divide in the usual manner by horizontal walls in such 
a manner that the upper cell remains in pit-connection with the central cell while 
the cover-cells of the sporangia are connected with the stalk-cell (fig. 420 A, Kyrın 
p- 61). The pits connecting the central cell with the sterile pericentral cells are situ- 
ated at a much higher level than that connecting it with the stalk-cell (fig. 420). 
At the stage of maturation the central cell, the stalk-cell and the pericentral cells 
contain several nuclei. For further details in the development of the sporangia see 
Kylin 1914. 
The germination has not been observed by me, but I have once found a spore- 
