190. First spermatocyte, anaphase.
191. Second spermatocyte, equatorial plates containing 9 large chromosomes and 1 small one.
192. Chromosomes from prophase of the first spermatocyte, all from the same cyst.
Plate XIII.
Adalia bipunctata (Family Coccinellidæ).
Fig. 193. Equatorial plate of spermatogonium, 20 chromosomes—19 large, 1 small.
194. First spermatocyte, spireme stage, x the heterochromosome group.
195. First spermatocyte, metaphase.