98 BOTANICAL GAZETTE 
Fic. 1. Oogonium beginning to develop. 
Fic. 2. Young oogonium. 
Fic. 3. Young oogonium, large vacuoles forming. ’ 
Fic. 4. Oogonium, flattened vacuoles marking the positions where 
wall would have been formed. i 
degeneration with the gradual disappearance of the chromatin and 
of the nuclear membrane: a, from antheridium; b, from just below thea 
¢, from near the oogonium; d, from within the oogonium.  : 
Fic. ro. Old oogonium with gamete nucleus in the central mass ¢ 
plasm and degenerating nuclei (d) in the peripheral layer. . 
Fic. 11. Oogonium older than fig. 10 and probably mature, 
degenerating nuclei (d) in the peripheral layer of protoplasm. 
‘Fic. 12. Fertilized egg, gamete nuclei fusing in a mass of dense pr 
Fic. 13. Tip of oogonium showing mass of sperms in the slime at 
5. 14. Gamete nuclei showing comparative size and general 
Structure when about to fuse. . 
