Li) 
1 
Phyllophora Brodizi and Actinococcus subcutaneus. 
(Actinococcus) what they supposed to be undeveloped pro- 
carps. 
As shown by Scumitz and DARBISHIRE, the nemathecia- 
producing filaments force their way through the surface of 
the plant, in several places forming small cushions fusing 
together to one nemathecial body which at last becomes globu- 
lar. In some cases one cushion only arises, on the upper face 
of the fertile frond, corresponding to the face where the 
procarp was situated; the intercellular filaments of the tetra- 
sporophyte do not reach the opposite face of the frond 
(fig. IV). But usually a new cushion arises later, the fila- 
ments of the tetrasporophyte forcing their way to the 
opposite face of the frond where they pierce the surface 
at several points (fig. VII), forming a number of small 
cushions fusing into one. The lower cushion in fig. VIII 
has evidently originated from the same central cell as the 
upper one, but later than this, and its origin from a num- 
ber of distinct points is still easily to be distinguished at the 
lower boundary of the cushion though the outline of the 
cushion does not show any traces of the early fusion. The 
original surface of the frond is very distinct as a dark 
line interrupted by bright spots where the filaments have 
pierced it. Two such opposite cushions may finally fuse 
into one globular nemathecium encompassing the foliole. 
In fig. VI is given a transverse section of a young globular 
nemathecium showing a large central cell in the middle and 
radiating filaments directed to all sides, but exhibiting 
nothing of the gametophyte except the central cell and 
some of the surrounding cells. 
