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CHAS. W. HARGITT. 



pressure the cleavage is very irregular and unequal, as shown 

 in Figs. 6 and 7, drawn from life with the aid of the camera. In 

 Figs. 10 to 1 8 are shown conditions found in sections of an egg, 



FIG. 8. Sketch of section of egg, showing nearly regular cleavage. In two cells 

 are resting nuclei, and in others various phases of nuclear reorganization. 



which are almost exactly equivalent to similar sections obtained 

 in the study of T. mesembryanthemum ('(H 4 ). 



I think it will be evident, from even a cursory study of the 

 several figures and photographs, that the cleavage in this egg is, 

 like that of Pennaria, more or less erratic and indeterminate, and 

 conforms to none of the regular types. 



FIG. 9. Sketch of two cells of egg section, showing in one a dumb-bell shaped 

 nucleus in amitotic division. 



Another feature of cleavage remains to be considered, namely, 

 one which involves chiefly, perhaps in some cases wholly, the 



