26 Nr. 4. L. KOLDERUP ROSENVINGE: 
cell, or, as they may be named here, central cells, from 
which the starch-containing filaments radiate toward the 
periphery, having not yet pierced the cuticle. This has taken 
place in the case shown in fig. VII where a number of fila- 
ments issuing from a strongly developed intramatrical tissue 
are on the point of producing small cushions on the free 
surface of the frond. More advanced stages are shown in figs. 
IV, VI and VIII, where a large cell is seen at the centre of 
the nemathecial body. In most cases this cell has not longer 
a stellate shape but is roundish and surrounded by more 
or less densely jointed small round cells forming a medul- 
lary tissue while the outer part of the nemathecial body 
is built up by radiating filaments. The central cell in fig. 
VIII contains at least one small cell encompassed by the 
pseudopodes of the large cell which here and there form 
fusions. 
The large cells just mentioned were observed by 
SCHMITZ (1893, p. 378) who, however, interpreted them as 
sterile cells of the host-plant attacked by fertile filaments, 
belonging, according to SCHMITZ, to the parasitic Actinococ- 
cus subcutaneus, which surround them and become connected 
with them by pits, where-upon the named cells increase to 
larger cells with abundant plasmatic contents, and he refers 
to fig. 2 on plate VII in his paper where a cell of stellate 
appearance is situated at the centre of the supposed para- 
sitic cushion. A similar large stellate cell is figured by 
SCHMITZ under the young nemathecia of Gymnogongrus 
Wulfeni, they are interpreted by this author as a parasite 
named Actinococcus aggregatus (1. c. figs. 4—7). Here too 
we would remind the reader that DARBISHIRE and PHIL- 
LIPS observed in the neighbourhood of the nemathecia 
