PLATE 7 
EXPLANATION OF FIGURES 
Oogonia 
80 Resting oogonial cell showing the two chromatin nucleoli and the arrange- 
ment of the chromatin material. A very conspicuous cell membrane is found in 
all the early oogonial cells. 
81 Early prophase showing the newly formed chromatin aggregation. 
82 Formation of prophase chromosomes—nuclear wall practically invisible. 
83 to 86 Oogonial metasphase plate showing the overlapping and irregular 
arrangements of the chromosomes (figs. 83 and 85, vulgaris; 84 and 86, ancocis- 
conensis) . 
87 Late metaphase, side view (punctulata). 
88 Anaphase showing first visible appearance of the granular enlargements 
of the spindle fibers which form the ‘Zwischenkorper.’ 
88 to 92 Successive stages in the development of the ‘Zwischenkérper.’ 
90 to 92 Typical telophase oogonia, showing relation between the develop- 
ing Zwischenkorper and the cell wall. 
93 Daughter-nuclei reconstructed before the complete division of the cell or 
the disappearance of the Zwischenkorper. 
94 Midbodies surrounding a bundle of spindle fibers lying free in the 
cytoplasm. 
480 
