Figs. 44, 45. 
Figs. 46-48, 
Figs. 49-61. 
Figs. 62-77. 
Fig. 104. 
WıLcox. — Spermatogenesis. 
Figs. 78-103. 
PLATE II. 
Cicada tibicen. 
Advanced stages in the metamorphosis of spermatids. 
Spermatogonia. 
Spermatocytes, showing different positions of the body I suppose to 
be the nucleolus. 
Metamorphosis of spermatids, X 1,400. 
Metamorphosis of giant spermatids, 680, 
Normal spermatids from same microscopic field as Figures 78, 103, 
x 680. 
