ATLAS OF FERTILIZATION. 



PLATE II. 



i. ' 



>L, 





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THE EGG IMMEDIATELY AFTER ENTRAMCE OF THE SPERMATOZOON (P 13). 



SPERM-HEAD ADVANCING INTO THE EGG. 

 APPEARANCE OF THE ENTRANCE-FUNNEL (P. 14.) 



'%. 







ABNORMAL FERTILIZATION OF UNRIPE EGG. POLYSPERMY ENTRANCE-CONES iP. Hi. 



ROTATION OF THE SPERM-HEAD. ENTRANCE-FUNNEL iP 14i. 



