In the two hydroids (Pennaria and Clava leptostyla) under question, the maturation and fertilization processes take place in a perfectly typical fashion and form no exception to the general rule in this regard. The conclusion that the "nuclear nests" indicate the formation of nuclei de novo is shown to be untenable. The occurrence of these nests is explained by the conditions of nuclear reconstruction after cleavage, the chromosomal vesicles failing to fuse between successive divisions in Pennaria and the cytoplasmic division lagging behind nuclear division gives a syncytium with several nuclear groups. Maturation and the early cleavages take place by means of mitosis and not amitosis. No evidence whatever of amitotic division was found. My results regarding the maturation and fertilization phenomena make it very probable that Hargitt's failure to observe these stages was due simply to the fact that the eggs were not obtained at the right time of day. In eggs collected at the proper time (4-6 A. M.) there is no difficulty in proving the typical stages of maturation and fertilization.