INDEX 



539 



Wilson, on fourth molars, 101 



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



Winslow, foramen of, 280 



Wolff, on the kidney (Wolffian body), 306 



epigenesis, 339 

 Wolffian body, 306, 307 



duct, 41, 306, 307 



tubules, 308 



Wright, on blood plates, 200 

 Wright's blood stain, 505 



method for frozen sections, 498 



X 



Xylol, 507 



Yolk nucleus, 29 

 sac, 39, 382 

 stalk, 382 



Zenker's fluid, 492 

 Zona columnaris, 247 



pellucida, 29 



radiata, 29 

 Zonula ciliaris, 449' 

 Zuckerkandl, on chromaffin bodies, 152 



suprarenal glands, 406 



organs of Zuckerkandl, 152 

 Zymogen granules, 255 



