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THE EVOLUTION OF MAN, 



i 



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

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

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

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



