32 
Ila) or the egg, the upper polar and one synergid (fig. 5 IIb). 
Two nuclei are egg and synergid (fig. 5 Ifa) or egg and polar 
(fig. 5 IIb). One nucleus necessarily must be the egg, being 
either the undivided primary micropylar nucleus (fig. 5 IV) or 
possibly even the undivided megaspore itself (fig. 5 V). A sup- 
pression of the egg does not seem very probable. The case of 
Dasylirion in which there should be no egg in the micropylar 
group has been proved to be false. As long as no new cases are 
reported, we can safely leave out of consideration such a possibility. 
If we examine conditions more closely, it must be admitted, 
that this scheme really combines two reduction processes. The 
one first attacks the synergid-development, the other begins 
with a suppression of the egg-polar divison. An exact illustration 
of the situation is presented by fig. 6. 
Fig, 6. Reduction of the micropylar group, e = egg s = synergid 
Pp = upper polar nucleus. 
To confirm this conception about the development of the 
micropylar group the following list of instances drawn from 
literature is offered. 
Type I: the “normal development‘. . 
Type Ila : Aglaonema (Campspent, 1912), Garcinia (Treve, 
1911), Moringa (Rurerrs, 1922), Cypripedium (Pace, 
1907), Gastrodia (Kusano, 1915). 
Type IIé : (Juglans regia (Karsten, 1902) ?) 
Type Ila: Peperomia (Jounson, 1900, 1907, 1914, Brown, 1908) 
(Dieraea elongata (Maenvs, 1913) % 
