EXPLANATION OF THE ILLUSTRATION 
SELAGINELLA AMESIANA Darrah. The figure at the 
top shows a large megaspore with its equatorial 
flange. Note the thickness of the spore wall, One 
hundred times natural size. Nitrocellulose peel 
from the holotype. Preparation number 1. 
The figure at the bottom shows one megaspore 
pulled from a tetrad. ‘The spore shows a dense ves- 
icle, a large vacuole, and a thick spore wall. One 
hundred times natural size. Nitrocellulose peel from 
the holotype. Preparation number 2. 
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