JO H. II. NEWMAN. 



PLATE III. 



FIG. 5. A two-cell stage of cleavage. The two cells are of somewhat unequal 

 size, but the nuclei (n l and 2 ) are both in good condition and in the resting stage. 

 A pseudo-epithelium of deutoplasmic cytoids surrounds the blastomeres. ( X 800.) 



FIG. 6. A two-cell stage passing into the four-cell condition. Two mitotic 

 spindles are cut transversely to the axis. The spindle on the right (m.s) is cut 

 near the equatorial plate and shows only a few of the chromosomes. Other chro- 

 mosomes are scattered through several sections. The spindle on the left (m.s 1 ) 

 is in a late anaphase and has two groups of chromosomes, one at each end of the 

 spindle. The present section cuts through only one of these chromosome groups. 

 Large numbers of cytoids occur in other sections. (X 800.) 



