80 ART. 3. — S. IKEDA : CONTRIBUTIONS 



April 29, 9:3G a.m.: — Blastopore circle already completed, and some- 

 what reduced in size ; not circular in shape, hut elongated 

 antero-posteriorly between the two ex-ovates, showing that 

 growth downward has been accomplished mostly by the lateral 

 lips. Secondary ex-ovate nearly excluded out of the area, 

 although still connected with the dorsal lip by a narrow 

 channel. Original ex-ovate still attached to the ventral lip. 

 Left lip entire but right lip somewhat zigzag, showing that 

 growth was more or less disturbed. 

 G:02 p.m.: — Area of the segmentation cavity already disappeared. 

 Blastopore a very small but elongated spot in front of the 

 original ex-ovate which is attached to the ventral lip. Second- 

 ary ex-ovate in the same position as before. Neural plate 

 not recognizable. 



April 30, 9:30 a.m. : — Blastopore closed. Location of the embryonic 

 body still doubtful. 

 5:30 p.m. : — Embryonic body with the neural plate and the primi- 

 tive groove faintly recognizable in front of the original ex-ovate. 

 Secondary ex-ovate entirely disappeared. 



May 1, 7:24 a.m. : — Embryonic body distinct. Original ex-ovate attached 

 to the tail end. Embryo has its axis somewhat curved to 

 the left ; otherwise normal. 



The results in this egg are in the end strictly like tlio eggs 



of the corresponding number in the other groups. 



For the sake of convenience I append here a table showing 

 where the punctures were made on each egg : — 



