Explanation of Plate 4 
Fig. ۰ Proembryo of 5 cells, X 670. 
Fig. 2. | 
3. 上 X 472 
5 Successiveiy older stages of the embryo. 
3 X 5 
a 
$. X 28 
ka pd r4. Embryo, drawn on larger scale in Fig. y A lying in the endosperm. 
3, ER 
Br of these last two figures shows the position taken di: the proembryo ] 
as a result of the growth of the endosperm at the micropylar region 
(26) 
