159 



make a careful cytological investigation in order to decide the 

 character of the ES. 



.4 J3, Bi C 



Fig. VIII. H. aurantiacum, an epidermis cell from the nucellus becomes an embryo 



sac ami encroaches upon the typical embryo sac in A and B, in C between 



the second and third cell of the tetrad; in B> a dwarfed nucleus. 



C 

 Fig. IX. 



D 



/•; 



I will meanwhile call attention to some curious instances which, 

 according to my opinion, represent another form of embryo sac 



11* 



