f* o ^E/* HW? -*\ *y ~ x 





SU^ 



^fr t / 







., 



^^ f _v \ / // b-t-J >' " 



FIG. 62. The Maturation and Impregnation of the Animal Ovum. 



A, portion of the ovum of a Round worm (Ascaris megaioccpJiala), 



showing the sperm (sp) in the act of conjugation, and the unaltered 



