WeEnricH.— Spermatogenesis of Phrynotettix magnus. 
PLATE 2. 
Figs. 14-20.— Prophases of early spermatogonia. 
Figs. 14a, 14b.— Two successive sections of the same cell in earliest prophase. 
Figs. 15a, i5b.— Two sections of a single cell in early prophase. Formation 
of fine spiral thread. 
Fig. 16.— Polar view of later prophase. Fine spiral threads, all distinct. 
Composite granules prominent. 
Fig. 17.— Side view of later prophase. Accessory in vesicle. Longitudinal 
split beginning to appear in threads. 
Fig. 18— Section from distal pole of nucleus. Vesicular walls persisting. 
Fig. 19— Later prophase. Composite granules breaking up into polar 
granules. 
Fig. 20.— Later prophase. Accessory still in vesicle. 
Figs. 21, 22.— Side view and optical section, respectively, of telophase of last 
spermatogonial division. 
Figs. 23, 24.— Oblique side view and optical section, respectively, of early 
preleptotene stage. 
