OVARY OF LEPTODORA 



45 



E 



EL 



O.D. 



G. 



w 



FIG. 15. A, Ovary of a parthenogenetic Leptodma hi/alina ; B, base of another ovary 

 of the same species, showing a so-called " nutrient chamber " ; C, ovary of a female 

 Daphnia, showing the formation of a winter-egg. E, E^E^, Parthenogenetic egg ; 

 Ej), ovarian epithelium ; G, germarium ; N. C, nutrient chamber ; 0. D, oviduct ; W, 

 winter-egg ; 1, 2, 4, the other three cells of the same group ; II, III, two other 

 groups of germ-cells. 



