(348 ) 
of the division may be clearly seen, while the adjoining cell 
is in the process of deterioration (fig. 54). The outer cell re- 
sulting from the second division also disorganizes, so that the 
functional cell is the lowest of the series (fig. 55). In this 
case the remains of the discarded cell from the first division 
are still visible. 
It is quite probable that the development of the embryo-sac 
from the spore thus formed proceeds in the usual manner, 
though some of the steps were not observed. The definitive 
embryo-sac is represented by figure 56. In this case the egg- 
apparatus presents the usual features. The synergids are 
rather more conspicuous than in the preceding form (fig. 49), 
and the odsphere less so. The antipodals are large and stain 
deeply, though the latter fact is apparently due to their par- 
tially disorganized condition. The endosperm nucleus is 
formed by the union of the two polar nuclei, though the two 
larger nucleoli thus contributed remain distinct, so far as it was 
possible to observe. The embryo-sac at this stage does not 
present the much-vacuolated appearance which was character- 
istic of some of the foregoing forms (Apodanthera), but in- 
stead is very compact and like that of Bryonopszs is filled 
with starch. This starch is conspicuous in the embryo-sac 
until after fertilization and then soon disappears (jig. 57). 
At this time the embryo-sac begins to expand and the sur- 
rounding tissue is affected for some distance, as indicated by 
its staining properties. As appears in some of the cases 
already described, the endosperm becomes modified in charac- 
ter as the embryo begins to form. It not only loses its starch 
but becomes distributed as a very thin sac closely approxi- 
mated to the rapidly receding tissue of the nucellus. The 
nuclei are at first free in the endosperm and irregularly dis- 
tributed through it. They are not nearly so conspicuous in 
size and chromatic content as was the original nucleus. In 
a still later condition of the endosperm the nuclei enlarge 
somewhat ( 2g". 60), but it is to be noted that with the progress 
of development the nucleoli constantly diminish in size. The 
endosperm has become entirely cellular before the embryo 
