INDEX 539 



Wilson, on fourth molars, 101 Y 



Wilson, E. B., on sex chromosomes, 21, 28 



Winslow, foramen of, 280 Yolk nucleus, 29 



Wolff, on the kidney (WolfBan body), 306 sac 39, 382 



epigenesis, 339 stalk, 382 



Wolffian body, 306, 307 Z 



duct, 41, 306, 307 , 



tubules, 308 Zenker's fluid, 492 



Wright, on blood plates, 200 Zona columnaris, 247 



Wright's blood stain, 505 pellucida, 29 



method for frozen sections, 498 radiata, 29 



Zonula cmans, 449 



Zuckerkandl, on chromaffin bodies, 152 

 suprarenal glands, 406 

 organs of Zuckerkandl, 152 

 Xylol, 507 Zymogen granules, 255 , 



