Fic. 18.—Cyst of secondary odgonia in the resting stage. XX 1,334. 
Fic. 19.—Cyst containing secondary odégonia in various stages of 
mitosis. XX 1,334. 
Fic. 20.—Young oocyte with oval nucleus. X 1,334. 
Fic. 21—A slightly later stage than Fig. 20. The nucleus of the 
oocyte has assumed a rounded form. XX 1,334. 
Fic. 22.—Early growth stage of the odcyte. The nucleus contains a 
well defined, apparently continuous spireme. X 1,334. 
Fics. 23-24.—Stages showing the gradual condensation of the nuclear 
substance previous to synizesis. XX 1,334. 
Fic. 25.—Synizesis stage. XX 1,334. 
Fics. 26-27.—Post-synizesis stages. Part of the chromatin has been 
evolved in the form of a continuous convoluted spireme: the nucleoli and 
the rest of the chromatin appear in the form of irregular masses lying 
against the nuclear wall or in the meshes of the spireme. XX 1,334. 
Fics. 28-29.—Stages showing the longitudinal splitting of the spireme. 
X 1,334. | 
Fic. 30.—Slightly later stage. The sister portions of the spireme have 
begun to separate. XX 1,334. 
Fic. 31.—Young odcyte surrounded by its zona pellucida. In the 
nucleus the sister portions of the spireme are almost entirely separated. 
X 1,334- 
Fic. 32.—Section of an odcyte in which there is a complete separation 
of the sister portions of the spireme. XX 1,334. 
Fics. 33-34.—Nuclei of the young odcytes showing the division of the 
spireme into double segments. XX 1,334. 
Fic. 35.—Section of the nucleus of a young odcyte showing the begin- 
ning of the resolution of the amorphous masses shown in Figs. 26-34. 
X 1,334- 
Fic. 36.—Section of a young odcyte showing the differentiation of one 
of the amorphous masses into a meshwork of chromatin threads and 
rounded nucleoli. 1,334. 
Fic. 37—Section of a cyst containing odcytes in different stages of 
development. X 1,000. 
Fic. 38.—Stage following that of Fig. 36, showing the relation of the 
nucleoli, the oxychromatin threads and the chromosomes. In the cytoplasm 
are numerous vitelline bodies. XX 1,334. 
Fic. 39.—Section of a young odcyte. The chromosomes are scattered 
throughout the nucleus and they have assumed the feathery appearance 
which characterizes them throughout the rest of the growth period. The 
oxychromatin threads are entirely separated from the nucleoli and have 
become very granular. In the cytoplasm are numerous vitelline bodies of 
various sizes. XX 1,334. 
