AJ 
The Reproduction of Ahnfeltia plicata. 
cells are scarcely different from the others except that they 
are richer in protoplasm. 
At this period two kinds of cells different from the 
others appear in the nemathecial filaments. Some cells ter- 
minal on radiating cell-rows, usually directly on cortical cell- 
rows, become flask-shaped, being attenuated upwards, 
Fig. 3. Nemathecium, October. A, vertical section. 244 : 1. B—D, upper 
ends of nemathecial filaments with generative cells. 670 : 1. 
thus reminding one of carpogonia and like these staining 
deeply with hæmatoxylin, but their content is homogeneous 
and the nucleus is usually not or scarcely visible. They often 
appear in great number at the bottom of the nemathecium, 
arresting the growth of the filaments on which they are 
terminal (figs. 3 and 4); but they are also to be found at 
higher levels, even near the surface, I have, however, never 
seen them protruding above the surface. Only in one case, 
in a wart from a plant having grown in an aquarium from 
