830 



INDEX 



Yamanouehi, Sh., The Cilia-forming 



Organ of Plant Cells, Bradley M. 



Davis, 546; Apogamy in Ferns, 



Bradley M. Davis, 743 

 Yerkea, E. M., Behavior of the 



Higher Animals, H. S. Jennings, 



Zuelzer, Margaret, The Influence of 

 Eegeneration on Moulting in Crus- 

 tacea, C. R. Stockard, 140 



Zur Strassen, Otto, Mind in Animals, 

 H. S. Jennings, 754 



