EMBRYOLOGY OF CRYPTOBRANCHUS 



127 



28 



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29 



30 



Figs. 27-30 Changes at the periphery of an ovocyte in the process of resorp- 

 tion; the follicle cells are shown in a phagocytic role. Fig. 27, read from left to 

 right, shows the beginning of the process (compare with fig. 22 showing the nor- 

 mal condition of the follicle). The remaining figures, taken from different ovo- 

 cytes, show successively later stages. X 244. ?/., yolk; z. -p., zona pellucida. 



