205. Giant spermatocyte, spireme stage, heterochromosome group double the usual size.
206. Giant spermatocyte, prophase.
Chlænius æstivus (Family Carabidæ).
207. First spermatocyte, spireme stage, showing the unequal pair associated with a large plasmosome.
208. First spermatocyte, metaphase.
209-210. First spermatocyte, beginning of metakinesis.
211. First spermatocyte, equatorial plate, 17 chromosomes.
212. First spermatocyte, anaphase, showing elongated centrosome and diverging univalent chromosomes.
Chlænius pennsylvanicus.
213. First spermatocyte, spireme stage.