152 BOTANICAL GAZETTE [FEBRUARY 
with C. circinalis. In Zamia and Ceratozamia fertilization is 
followed by a series of free nuclear divisions and _ finally cell 
formation takes place only at the bottom of the egg, less than 
one-fifth of the egg becoming segmented, while the rest remains in 
the free nuclear condition. In Dioon edule the free nuclear stage is 
followed by an evanescent segmentation of the entire egg, but later 
lies: 3 ae 
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Fic. 12.—M. Moorei: a poisoned plant 
stages show segmentation only at the bottom of the egg, with free 
nuclei above. Macrozamia Moorei, in the only stages available, 
shows complete segmentation, but a large vacuole has already 
developed, and within the limits of the egg there remains only 4 
cellular layer two or three cells in thickness (fig. 10). Material o! 
Cycas revoluia in this stage, furnished me by IKENO several years ag9, 
shows exactly this condition. Whether both have passed through 
a stage of complete segmentation, as in Ginkgo, or segmentation 
