Plate VIII 



Pceciloptera septentrionaVts {Family Fulgoridte) 

 Fig. 256 Spermatogonia! rest stage. 

 Fig. 257 Spermatogonia! sp!it spireme. 



Fig. 258 Spermatogonium, spireme segmented and condensed, segments split. 

 Fig. 259 Spermatogonia! equatorial plate, 27 ctiromosomes. 

 Fig. 260 Spermatogonia! metapliase. 

 Fig. 261 Spermatogonia! anaphase. 

 Fig. 262 First spermatocyte, early synapsis stage. 

 Fig. 263 First spermatocyte, contraction stage. 

 Fig. 264 First spermatocyte, spireme stage. 



Figs. 265, 267 First spermatocyte, rest stages, growtli in size of nucleus and cell. 

 Fig. 268 First spermatocyte, split spireme stage. 

 Fig. 269 First spermatocyte, propliase, tetrad formation. 

 Fig. 270 First spermatocyte, equatorial plate, 14 cliromosomes. 

 Fig. 271 First spermatocyte, metapliase. 

 Fig. 272 First spermatocyte, anaphase. 



Figs. 273, 274 Second spermatocytes, equatorial plates, containing 14 and 13 chromosomes, respect- 

 ively. 



Fig. 275 Second spermatocyte, metaphase. 



Fig. 276 Second spermatocyte, anaphase. 



Figs. 277, 278 Spermatids, formation of fibers in the "Nebenliern." 



Fig. 279a Spermatid, "Nebenkern" separated by a partition into two tubes. 



Fig. 279b Cross section of "Nebenkern" structure as in 279a. 



Fig. 280 Spermatid, elongation of fibers and tubes. 



Fig. 28 1 a Spermatid, irregular spiral of twisted tubes. 



Fig. 281b Cross sections of tubes of 281a. 



Fig. 282a Spermatid, further twisting and flattening. 



Fig. 282b Cross section of 282a. 



Fig. 283 Female somatic equatorial plate, 28 chromosomes. 



