7lp)^l*' GlSp. 



mmm 



Figs. 6-9. Successive Stages in the Maturation and Febti- 

 LizATioN OF the Egg OF Ncreis, less highly magnified than 

 Figs. 6 and 7, showing the progress of the entrance cone {EC) 

 and sperm nucleus {^N) into the egg. Fig. 6 shows the first 

 maturation- spindle of the egg {1st Mat. 8p.) ; Fig. 7, the first 

 polar body {1st PB) formed by this division; Fig. 8, the sec- 

 ond maturation spindle {^d Mat. 8p.) and the sperm nucleus 

 and spindle (t?iV) ; Fig. 9, the division of the male and 

 female nuclei in the first cleavage spindle {1st CI. 8p.). (From 

 F. R. LiUie.) 



