Wilcox. — Spermatogenesis. 



PLATE V. 



Culoptenus femur-rubrum. 



Figs. 100, 191. Spermatocytes, second division. 



Fifjs. 192-195. Spermatocytes, first division. 



Figs. 196-200. Spermatid metamorphosis. 



Fig. 201. Spermatocyte just before ring condition. 



Figs. 202-220. Degenerating cells. 



Figs. 221-229, 244. Spermatocytes, preparatory to first division. 



Figs. 230, 232-236. Spermatids. 



Fig. 231. Spermatocj'te, second division. 



Figs. 237-241. Spermatocytes, first division. 



Figs. 242, 243. Spermatocytes, ring formation. 



