ATLAS OF FERTILIZATION. 



PLATE II 



^ 



SPERM-ASTER DEVELOPING AT THE BASE OF THE SPERM-NUCLEUS (P. 141. 



ROTATION OF THE SPERM-NUCLEUS COMPLETED EARLY SPERM-ASTER ,P 15.. 



N, 





■ K 



'' V - 



•«*. 



.'7 



/ 







V 



INWARD PROGRESS OF THE SPERM-NUCLEUS TOWARDS THE EGG-NUCLEUS. 

 THE SPERM-ASTER: ROTATION DELAYED (P. 16). 



DOUBLE-FERTILIZED EGG, SHOWING TWO SPERM-NUCLEI, ONE ENTRANCE-CONE, 

 AND THE EGG-NUCLEUS iP. 16i. 



