400 



INDEX 



Winters, L. M., 79 



Wislocki, G. B., 78, 79 



Witebsky, E., 344 



Wittek, M., 4, 264 



Woerdeman, M. W., 222, 345, 368 



Woglom, W. H., 357 



Wolfe, H. R., 350 



Wolff, S., 193 



Woodruff, M. F. A., 352 



Woodward, A. E., 33 



Wright, E. S., 76, 87, 124 



Wyburn, G. M., 116 



Xenopus 



reduction of animal half in em- 

 bryo, 292 

 X-radiation, 217, 354 



Yamane, J., 123 



Yeas, M. K. W., 4, 342, 349 



Yellow crescent, 323 



Yolk 



absorption of antisera with, 346- 

 347 



disintegration and preservation of 

 granules, 311 



formation of, 264 

 Young, W. G., 77, 80 

 Youngner, J. S., 351 



Zeuthen, E., 3, 177, 181 

 Zollinger, H., 280 



Zona pellucida, 82, 87-92, 119, 124 

 Zwilling, E., 212 



