978 



INDEX. 



PAGE 



Wolffian bodies, development of the epididymis from 928 



Wolffian ducts 914, 927 



development of the vasa deferentia from 928 



Woorara, pulsation of the heart in animals poisoned 



by 56, 59, 61 



absorption of 319, 327 



influence of, upon nervous irritability 595 



Xanthine.. 



PAGE 

 .. 420 



Yawning 



Yolk, principal, or formative . 

 Youth... 



Zona pellucida. 



134 



870 

 945 



781 



THE END. 



