EXPLANATION OF THE ILLUSTRATION 
SeELAGINELLA AmestANA Darrah. The figure at the 
top shows a megaspore with a tetrad scar. Note the 
three spore membranes, the mesospore and endos- 
pore have shrunken away from the exospore. One 
hundred times natural size. Nitrocellulose peel from 
holotype. Preparation number 2. 
The figure at the bottom shows a megaspore and 
its enclosed megagametophyte. Note in the upper 
corners, portions of two sister spores. The gameto- 
phyte is composed of cells with large nuclei and 
moderately large nucleoli. Detail of cell-contents 
is beyond the depth of focus. One hundred times 
natural size. Nitrocellulose peel from the holotype. 
Preparation number 2. 
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