224. Equatorial plate of polar spindle of parthenogenetic egg.
225. Equatorial plate of segmentation spindle of parthenogenetic egg.
Sagitta bipunctata.
Fig. 226. Resting spermatogonia.
227. Prophase of spermatogonial mitosis.
228. Last spermatogonial mitosis, metakinesis.
229. Anaphase of same, showing synapsis of chromosomes at pole of spindle, and element x.
230. Resting spermatocyte of first order.
231. Bouquet stage.
232. Later growth stage.