Arthur Dendy, 1911 Encyclopædia Britannica (1911)
“ The ripe gemmule is very resistant to adverse conditions and is capable of remaining dormant for a lengthened period, and of developing into a new sponge on the return of favourable conditions. In temperate climates the gemmules remain dormant throughout the winter and develop in the spring, the development being very similar to that of an ordinary fertilized ovum except that it begins at the “morula” stage, with the numerous statocytes representing the blastomeres. ”
