137 
branch. The further divisions and branchings I have not followed; they result in 
the formation of a glomerule of radiating filaments, the two or three last cells of 
which are swollen and produce each a carpospore. As each fertile branch bears as 
a rule more than one carpogonium, the glomerules may perhaps sometimes be 
composed of two or even three cystocarps, being thus syncarps. The position of 
the antheridia in the neighbourhood of the carpogonia results in emptied anthe- 
ridia being frequently visible in ripe eystocarpia amongst the spore-producing fila- 
ments (fig. 63). 
I have no doubt that Kyrın is perfectly right in referring the Rhodochorton 
chantransioides to this species, as it agrees with it in all but the reproduction. 
However, the tetraspore-bearing plants are as a rule smaller, ca. 2 mm. high, and 
it may be added that they usually form continuous felted coverings while the 
sexual plants form isolated tufts. On the other 
hand specimens fully agreeing with those des- 
cribed by REINKE and Kyrın, only bearing mo- 
nosporangia instead of tetrasporangia, also occur. 
Young still undivided tetrasporangia are out of 
the question in this connection, for I have in 
many cases met with specimens bearing nume- 
rous well-developed monosporangia, some of 
which were emptied but not one with divided 
contents. Usually each plant bears either tetra- 
sporangia or monosporangia, but the two kinds 
of plants often grow together side by side, as 
the plants represented in fig. 64. The only differ- 
ence is that the monosporangia are smaller than 
the tetrasporangia. The monosporangia I found 
(10—) MS y long, Il] (—8,5) [2 broad , the Chantransia efflorescens. Branchlet with ripe 
tetrasporangia 15-28 L long, 8—12,5 m broad. cystocarp showing still two emptied antheridia 
5 ee 5 at the top of the branchlet. 85:1. 
Referring to the above quoted descriptions it 
may be added that two sporangia-bearing branchlets are frequently sitting on one 
cell in the monosporangia-bearing as well as in the tetrasporangia-bearing plants; 
they are usually opposite but may also be placed near each other on one side of 
the filament (fig. 64). 
The species has been met with in the Danish waters in the months April to 
August. Sporangia-bearing plants occur in April to June, more rarely in July. Sex- 
organs have been met with in all the months named, fully developed cystocarps 
only in June to August. This in connection with the fact that the two kinds of 
reproductive organs occur in different individuals suggest the existence of an alter- 
nation of an asexual generation appearing in spring with a sexual one occurring 
prineipally in summer. If this supposition is right, the germinating plants men- 
tioned above (fig. 61) must be young sexual plants. Unfortunately LEHMANN does 
D. K. D. Vidensk. Selsk. Skr., 7. Række, naturvidensk. og mathem. Afd. VII. 1. 18 
