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Figs. 183-185. — Dioon ediile: development of proembryo; fig. 183, base of 

 proembryo, showing character of segmentation at a stage when the entire egg is seg- 

 mented; X108; fig. 184, diagram of entire proembryo at the stage shown in fig. 183; 

 the segmentation is di.sappearing in the upper region; X20; fig. 185, permanent walls 

 at the base, but as yet no drfferentiation into regions; free nuclei above; membrane (m) 

 of egg not yet ruptured; X 108. — After Ch.-\mberi.ain (70). 



