Il OVARY OF ZLEPTODORA 45 
Fic. 15.—A, Ovary of a parthenogenetic Leptodora hyalina ; 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-ege. ; 
Ep, ovarian epithelium ; G, germarium ; 1.0, nutrient chamber ; 0. D, oviduct ; W, 
winter-egg; 1, 2, 4, the other three cells of the same group; II, II, two other 
E, E,-E,, Parthenogenetic egg ; 
groups of germ-cells. 
