CHROMOSOMES OF HYUATINA SENTA. 



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FIG. i. Maturation spindle of male-producing egg being formed within nucleus. 

 A distinct nuclear membrane is still present. Only part of the spindle is in this 

 section. 



FIG. 2. Equatorial plate of maturation spindle of female-producing egg. 



FIG. 3. Metaphase of first maturation spindle of egg of a male-producer. 

 The spindle is viewed obliquely from the side, and the chromosomes are not all at 

 the same depth in the specimen. 



FIG. 4. Metaphase of the first maturation spindle in a male-producing egg. 

 The view is nearly polar. Three of the chromatic bodies, set obliquely, give 

 indications of being bivalent; the rest appear single. 



FIG. 5. Portion of first maturation spindle, in late anaphase, of male-producing 

 egg. The spindle is cut obliquely, and the outer end is here shown. 



FIG. 6. Inner group of chromosomes, six in number, in late anaphase of first 

 maturation division of male-producing egg. 



