72 H. H. NEWMAN. 



PLATE IV. 



FIGS. 7 and 8. Two sections through the same egg, showing one clearly defined 

 mitotic spindle (m.s 1 ), a cell containing three nuclei in the resting stage, one cell 

 with what appears to be a degenerating nucleus (?), and one cell, shown in both 

 sections, with an imperfect mitotic spindle and only a few chromosomes (ra.s 2 ). 

 Cytoids of all sizes are mixed in with the blastomeres. Such an egg seems to be in 

 about a four-cell stage, but will probably not go much further. ( X 800.) 



