PLATE 2 
EXPLANATION OF FIGURES 
12 to 22 Various phases of cleavage of similar eggs. Figs. 14 to 18 phases 
of cleavage in a single egg at intervals of ten minutes. The irregular spaces shown 
are interesting as so-called segmentation cavities. As a matter of fact, they are 
but aspects of the peculiar ectosarcal and amoeboid activities, and hence abso- 
lutely devoid of any blastocoel relations. Such is likewise the case with other 
similar features in other cases. 
19 to 22 Varying phases in the cleavage of another egg, sketched at intervals 
of fifteen minutes. In these are shown in typical aspects the ectosarcal features 
more or less common in these eggs. The various strands, papillae, etc. are con- 
spicuous. 
12 to 13 Aspects of later cleavage of the egg body shown in figs. 9-11. 
23 Gonophore of Clava showing the unusual feature of two perfectly formed 
and typical germinal vesicles in a single egg. X about 100. 
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