148 
Campbell.— The Gametophyte and 
Only a small number of the next stages were found, and these were not 
very well fixed and showed more or less shrinkage. Text-fig. 5, B, shows 
the first division in the embryo, by which the large suspensor cell is cut off 
from the terminal cell which is to form the embryo proper. This division 
is transverse, and is followed by a second division in the terminal cell which 
probably is to be considered as the basal wall, dividing the embryo into an 
epibasal and a hypobasal region. So far as could be judged, the direction 
of the basal wall is always approximately horizontal. There is probably 
some variation in the orientation of the basal wall with reference to the 
Text-fig. 6. A-r>. Four of a series of sections of a young embryo. x 270. l-b , 
the basal wall. E. Three similar sections of an older embryo in which the cotyledon and root 
are already evident. s . , suspensor; r., root initial ; cot ., cotyledon, x 100. 
axis of the suspensor cell, which also is sometimes almost horizontal in 
position. 
Text-fig. 5, D, shows two sections of a somewhat older embryo. The 
nearly globular embryo is attached to the large suspensor cell, and is 
probably cut in a nearly median plane. The epibasal region is occupied 
by a series of columnar cells, the central one of which is possibly the initial 
for the stem apex. Just below the basal wall is a triangular cell which 
suggests a root initial ; but as no stages between this embryo and much 
