oo 



ART. 17. — N. YATSU. 



A, 13, C, D, E and F, iiilidia Ironi the two animal celLs ot" a compressed 

 etjg ; G, H, I and J, pilidia from the vegetal cells of a compressed egg. 



2 A 6 anenteria (Fig. 20 A— F). 



2 V 4 thick walled iiivaginated larvae (Fig. 20 G — J). 



Tbe cag:es are less numerous than could be wished. Yet it 

 seems almost natural to correlate this clear cut result with tlie 

 shifting up of the third cleavage plane. 



