1910] SMITH—ZAMIA FLORIDANA 139 
Next to this broken tissue there are several layers of cells (@’) which 
resemble those in fig. 16 immediately surrounding the sac. These 
are swollen and have every appearance of being active, nutritive cells. 
Beyond this again is the deeply staining tissue (6), but narrower now, 
as if some of the cells had changed in their appearance and had taken 
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on the function of the cells which previously bordered the sac. This 
tissue is narrower still toward the chalazal end of the sac. 
Figs. 20 and 21 were made from an ovule in which the embryo 
sac was shrunken badly, but the amount of “spongy tissue’? formed 
was unusually large and compact. The outer part shows radiation 
in its cell rows, as in other earlier stages. In one case this increase 
of “spongy tissue” was so great that it almost filled the interior, and 
the embryo sac had not developed. All these facts point to an active 
spongy tissue” such as Miss FERGUSON claims for Pinus (5), and not 
