INDEX TO VOLUME L 487 
x 7 Z 
| Xeno-parasites 477 : Zamia, female gam pe £35) ovu- 
_ Xenoxylon 70 late sae a ova 
; a Zanthoxylum 
a § > fer Indaksive Abstammungs- 
. Vererbungslehre 314 
Yezonia 68 Zijlstra, K., work of 237 
Young, Mary S. 81, 236 
