1913] PACE—APOGAMY IN ATAMOSCO 393 
Fic. 3, a.—The generative nucleus from fig. 3; X 1000 
Fic. 3, 6.—The remainder of the above nucleus from the adjacent section; 
Rane show longitudinal splitting; 12 chromosomes in a and 6; X 1000 
Fic. 4.—Diagram of young ovule showing mother cell; 600. 
Fic. 5.—Two-nucleate sac; daughter nuclei without separating walls; 
xX 400 
Ics. 6 and 6, a.—Two adjacent sections of the same sac; both nuclei of 
micropylar end of sac in anaphase stage; in each spindle 24 chromosomes can 
be counted at one end; an accurate count at the other end is not possible; 
X 1000. 
Fic. 7. Pussies at chalazal end of four-nucleate sac with 24 chromo- 
somes; 1000 
Fic. 8. an somatic cell tual ovule walls in metaph howing 24 chromo- 
somes; X 1000 
FIG. 9. anges of the third division of the sac; remains of previous 
spindle; the uncut spindle of the present division shows the beginnings of wall 
formation; the cut spindle is perpendicular to the section, so only one end of 
it is shown; this nucleus shows approximately 24 chromosomes; X 1000. 
Fic. 10.—The egg apparatus from mature sac; filiform apparatus well 
developed, but no notch in the synergids; X 1000. 
Fic. 11.—Antipodal end of sac; polars in contact; 
Fic. 12.—Micropylar end of sac after pollen tube Pata “<600. 
Fic. 13.—Micropylar end of the sac; 1000 
Fic. 13, a.—Primary endosperm of same sac before triple fusion is com- 
plete; 1000. 
Fic. 14.—Egg and miale nucleus almost in contact; 1000. 
Fic. 14, a.—Triple fusion from same sac; X 1000. 
Fic. 15.—Micropylar end of sac; 600. 
Fic. 16.—Egg nucleus with well developed spirem and male nucleus near 
it; X 1000. 

Fic. 17.—Egg nucleus. showing approximately 24 chromosomes; male 
nucleus near it; 
G. 18. Miceslac end of sac; egg nucleus = ce neaea 24 
Bice the nuclear membrane has disappeared; X 
1G. 19.—Egg nucleus similar to that in fig. 17; 1000. 
Fic. 20.—Egg nucleus similar to that in fig. 18, but sperm still has nuclear 
membrane; X 1000. 
Fic. 21.—Spindle beginning to organize in the egg; male nucleus very 
dense; 000. 
Fic. 22.—Metaphase in the egg nucleus; nuclear membrane of the male 
nucleus breaking down; 1000. 
Fic. 23.—Anaphase in egg nucleus; male nucleus has approximately 12 
chromatic masses, apparently chromosomes; X 1000. 
