The Reproduction of Ahnfeltia plicata. 11 
fig. 6B is shown a group of generative cells, situated at a 
low level in the nemathecium, at the limit towards the cor- 
tex, from the upper cells of which group new branched 
cell-rows growing obliquely upwards are produced; these 
cell-rows are thicker than the nemathecial filaments be- 
tween which they penetrate. 
In specimens collected in the middle of November the 
nemathecia had grown thicker and had also increased in 
circumference, the marginal part growing along the surface 
CT 
\A \\\ a 
; 
VA) 
Fig. 8. Vertical section of nemathecium, November. 160: 1. 
of the frond from the insertion of the nemathecium, and 
the nemathecial filaments being here directed outwards. 
The outermost (lowermost) filaments are close to the sur- 
face of the cortex but not coalescent with it, and the 
cuticle of the frond remains easily discernible (fig. 8). No 
connections between the nemathecial and the cortical cells 
take place here. The large generative cells found in Oc- 
tober are found again in the lower portion of the cushion, 
partly immediately over the limit towards the cortex, partly 
at a somewhat higher level. They are easily recognisable 
by their greater size, their irregular shape, their dense cell- 
contents and their high staining power with hematoxylin. 
A lively development of cell-filaments like that shown in 
fig. 6 B has taken place, a great number of upward growing 
