FEMALE ORGANS OF FISHES. 



573 



In the Salmon the free surface of the stroma is exposed. In the 

 Osseous Fishes that retain and hatch their ova the stroma does 

 not extend to the posterior part of the ovarian sac, but this 



384 



Viscera of female Shark, xx. 



serves as a kind of uterus, and contains an abundant albuminous 

 secretion at the season of the internal incubation. The viviparous 



