On the Histology of the Ovary and of the Ovarian Ova in certain Marine Fishes

Abstract

ABSTRACT In my paper in the ‘Journal of the Marine Biological Association,’ vol. iii. No. 2, p. 154, I have described the development of the yolk in the plaice and dab as commencing by the deposition of yolk granules in a thin layer near the surface of the egg, and proceeding by the continual extension of this layer towards the centre. I have also described and figured the appearance of minute refringent globules distributed sparsely throughout the protoplasm of the egg, in specimens of the sole which were examined a little time before the commencement of the spawning season. Such globules were also seen in spent ovaries of the sole, and seemed to indicate that the formation of yolk occupied more than a year in some fishes, while in the plaice and dab no sign of the development of yolk was seen until some months after the spawning season.