2Q4 



THE EVOLUTION OF MAN. 



Fro. 77. — Egg from the uterus of a Eabbit (4 mm. in diameter). The 

 perm membrane vesicle (h) has slightly retreated from the smooth outer 

 egg-membrane (prochnrion, a). The cii'cular germ-area (c) is visible in the 

 'entre of the germ-membrane, and at the edge of the former (at d) the inner 



