8 Nr. 4. L. KOLDERUP ROSENVINGE : 
producing from their surface cells that grow out into cell- 
filaments forming a particular tissue in the inner part of the 
leaflet, which causes a swelling of the latter; the peripherical 
filaments may force their way through the cortex and form 
a nemathecium. The author confirms the statement of 
Scumirz that the filaments may grow out onto the opposite 
face of the leaflet and form a new or several new nema- 
thecial cushions. Further DARBISHIRE made the important 
observation that the tetraspores from the nemathecia that 
ripen in winter are able to germinate in cultures indepen- 
dently of any host-plant, forming deep red cell-filaments 
and cell-discs or cushions that he thinks would under better 
conditions develop into basal discs of Phyllophora Bro- 
divi. DARBISHIRE concludes from his observations that the 
nemathecia in Ph. Brodiwi are the true and only organs 
that produce tetrasporangia in this species. 
Unfortunately Schmitz was prevented from further 
investigation of this problem, as he died after a short 
illness in January 1895. 
DARBISHIRE’S conception of Actinococcus as an organ 
belonging to Phyllophora Brodiwi was accepted in my se- 
cond paper on the marine Alge of Greenland (1898, p. 33), 
while I had followed Scumirz in 1893 (p. 822). I now 
relied on my own observations too, having never in the 
Danish or the Greenland waters met with cystocarp- 
bearing individuals of Phyllophora Brodiei. SCHMITZ's view 
would lead to the absurd conclusion that this species does 
not possess any kind of spores. 
In the following years DARBISHIRE pursued his investiga- 
tions on this subject at Kiel and published a new paper 
in 1899, On Actinococcus and Phyllophora, in which, strange 
to say, he accepted the view of SCHMITZ. DARBISHIRE 
