60 BOTANICAL GAZETTE [JANUARY 
Similar behavior is reported for A//ium tricoccum (19) and A. a 
Canadense (19),in which of 170 embryo sacs examined at stages 
which should show antipodals they were found in but forty-five, 
there being in some of these but one or two of the cells present, 
and these very small and irregularly crowded together. Of these — 
170 sacs the egg apparatus was found in 165, and later stages” | 
examined showed normal embryos. A very large number of ; 
older ovules of A. cernuum was examined, there being but ed 
embryos found. ~ 
FERTILIZATION AND FORMATION OF EMBRYO. 
A very small per cent. of the female gametophytes succeed 
in developing oospheres and persisting until fertilization occuts, — 
for, as has been stated, disorganization most often occurs before — 
the egg apparatus is complete. The succession of regions as.dis- 
organization proceeds is noteworthy. Disorganization first affects 
the antipodals and may proceed no further, a condition of things — 
very common among angiosperms; it may advance to the polar 
nuclei or endosperm and stop there; or it may involve the ¢g8 — 
apparatus, which is the last to succumb. This process often 
involves the entire ovule to such an extent that it has almost 
disappeared when under ordinary conditions oospores would be 
found. ; 
A sufficient number of cases were found, however, to show 
mally large oospore, which almost fills the micropylar end of 
48, 55,56. Itis quite evident that many more oospheres are 
formed than are fertilized. . 
I was unable to make a sufficiently full investigation of | 
development of the embryo to justify any definite conclusions. 
embryos shown in jigs. 57 and 58 do not show the form supP® 
to be typical for monocotyledons, as given in Alisma (5 and 13, 
