Heredity and sex . Fig. 11. — Octopus, male showing hectocotyl arm (Jia). Cop-ulation (below), small male, A; large female, B. After separation the female deposits her strings ofeggs, which are fertilized by the sperm escaping fromthe spermatophores. In octopus and its allies, onearm, that is used to transfer the spermatophores, isspecially modified at the breeding season (Fig. 11). 26 HEREDITY AND SEX This arm is inserted by the male, as shown in the figure,within the mantle chamber of the female. In somespecies, Argonaut a argo for instance (Fig. 12), the arm

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Keywords: ., boo, bookcentury1900, bookdecade1910, booksubjectsex, bookyear1913