1 LATE 2 



EXPLANATION OF FIGURES 



Aglantha digitalis 



12 Egg nearly mature with germinal vesicle at periphery; chromatin con- 

 densing into chromosomes, nucleolus large and non-chromatic; chromatin grains 

 in cytoplasm. X 1090. 



13 Prophase of first maturation with chromosomes free in cytoplasm; spindle 

 not completely formed (4 chromosomes are present in adjacent section). Chro- 

 matin grains scattered in cytoplasm. X 1585. 



14 First maturation spindle with one chromosome lagging behind others in 

 its division. The lightly shaded chromosome in the egg is placed from the ad- 

 jacent section, other chromosomes of polar body in next section. X 1585. 



15 Telophase of first maturation division with the chromosomes splitting for 

 the next division; each chromosome composed of granules. Some of chromo- 

 somes in adjacent sections. X 1585. 



16 Same as figure 15, all of the chromosomes (8) of the egg in vacuoles at 

 inner pole of spindle. X 1275. 



17 Metaphase of second maturation; all of chromosomes of polar body pres- 

 ent, one of egg chromosomes in adjacent section. X 2000. 



18 Egg nucleus and two polar bodies, the latter placed in position from the 

 adjoining section. Some chromatin granules at side of egg nucleus. X 2000. 



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