CHAPTER XII.

ORGANS OF REPRODUCTION 157

Fishes are dioecious, 157--Hermaphroditism, 157--Oviparous and viviparous fishes, 157--Generative organs of Branchiostoma, 157--of Cyclostomes; their ova, 158--Female organs of Teleosteans and their ova, 158--Instances of females taking care of their progeny, 160--Male organs of Teleosteans, 162--Instances of males taking care of their progeny, 163--Generative organs of Ganoids, 163--of Chondropterygians and their ova, 166.