36 Nr. 4. L. KoLDERUP ROSENVINGE: 
The above mentioned suggestion of REINKE that Actino- 
coccus subcutaneus might possibly be an asexual generation 
of Phyll. Brodiæi growing parasitically on the sexual genera- 
tion is thus fully confirmed. 
The reproduction of Phyllophora Brodiwi now elucidated 
is very peculiar; no other instance agreeing with it has 
hitherto been described. Only the remarkable reproduction 
in Liagora tetrasporifera Borgs. discovered by Dr. F. BØRGESEN 
(1927, p. 39) can be compared with it. Most of the species 
of this genus, belonging to the Helminthocladiacew, have 
normal cystocarps, arising probably after a fertilization 
directly from the carpogonium, and the end-cells of which 
give rise to a carpospore, while tetrasporangia are not known 
with certainty. The species referred to has apparent cystocarps 
arising in the same way as those of the other species, but 
the end-cells of the cystocarpial filaments undergo a 
quadripartition and yield each a cruciately divided tetra- 
sporangium. Thus the “‘cystocarp” does not, properly speak- 
ing, deserve this designation; it is not a carposporophyte 
but a tetrasporophyte and can be compared with the tetra- 
sporophyte generation of Phyllophora Brodiwi. There is, 
however, a significant difference in that the tetrasporophyte 
of Liagora tetrasporifera has the appearance and the 
structure of a cystocarp with the only difference that 
the carpospores are replaced by tetrasporangia, while the 
tetrasporophyte in Ph. Brodiei is differentiated in an 
intramatrical, vegetative part and a number of extramatrical 
cushions fusing together into a large globular nemathecium 
showing no resemblance to a cystocarp but having a 
structure similar to that of the nemathecia in the diplo- 
biontic species of the same genus. 
The tetrasporangia appear in Liagora letrasporifera within 
