102 



T. NISHIKAWA. 



EXPLANATION OF PLATE IV. 



Fig. 1. An egg with embryo of 43 mm., seen from the embryonal side. Nat. size. 

 „ 2. Di;to, seen from the anti-embryonal side. Nat. size. 



Different views of the embryo of 32 mm. Zeiss 2 a,. 

 I Different views of the embryo of 50 mm. Zeiss 2 a,. 



Printed December 25, 1898. 



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