( 368 ) 
protoplasm of the cells. The process of cell-formation is 
initiated in the region near the embryo and the more distant 
parts are the last to become transformed. The compact 
character of the upper and peripheral portions of the endo- 
sperm is apparent only in the earlier stages; that which is 
found later being of a much more open nature (fg. 759). 
The expansion of the ovular tissue proceeds rapidly and 
by the time the endosperm has reached the cellular state (fg. 
158) the ovule has almost arrived at mature proportions. 
The first divisions of the odspore are transverse (ig. 156) 
and the suspensor consists usually of two cells, the third a 
terminal cell constituting the proembryo. The cleavages 
which follow in the proembryo are more or less irregular 
(fg. 1572). The subsequent divisions give rise to a pyriform 
mass of cells crowded into the apex of the nucellus. The 
external differentiation of the embryo proceeds as in the other 
cases cited, and the origin of the cotyledons is evident before 
any interval differentiation is apparent (fig. 159). 
Coccinta 
Owing to the difficulty experienced in growing this form 
the material obtained was but fragmentary. Hence only a 
glance can be taken at the condition observed in some of the 
earlier stages. 
In this form, which is included in this tribe chiefly on ac- 
count of the characters of the androecium, the ovules appear 
upon the placenta as in the case of some of the Cucurbiteae 
(see text-figure 6, Eto #). In Coccznia, as in some of the 
previous cases, the character of the tissue in the apex of the 
young nucellus makes it difficult to identify the archesporium. 
Only when the development of the megaspore-mother-cell is 
well advanced, does it appear probable that the origin of the 
tapetum and the primary sporogenous cell takes place after 
the usual manner (fg. 739). Inthe cases observed the spor- 
ogenous cell appeared situated below an axial row of sterile 
cells. In this as in previous cases the growth of the ovular 
organs, integuments, etc., keeps pace with the internal differ- 
