Z94 



THE EVOLUTION OF MAN. 



-tf'iG. 77. — Egg from the uterus of a Eabbit (4 mm. in diameter). The 

 perm men brane vesicle (6) has slightly retreated from the smooth outer 

 egg-membrane (prochorion, a). The circular <jerm-area (c) is visible in the 

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



