76 



SUPER-ORGANIC EVOLUTION 



which the nucleus has divided its chromosomes into 

 two equal parts. In this case there are four for 

 each half. In the karyokinesis which does not 

 precede the maturation, each of the chromosomes 



FIG. 17. 



Phases of the process of conjugation and the elimination of the polar 

 corpuscules in the ovule of the Ascaris megalocephala, according to O. 

 Hertwig. F, feminine nucleus ; Z, zoospore, or the nucleus derived from 

 the zoospore ; E, sphere of attraction, a formation of the first polar 

 corpuscule. Phase 1, the zoospore Z penetrates the ovum ; Phase 2, the 

 nucleus of the ovule prepares to eliminate the primary polar corpuscule ; 

 Phase 3, elimination of the first polar corpuscule and transformation of the 

 zoospore into a nucleus ; Phase 4, elimination of the second polar 

 corpuscule and transformation of the masculine nucleus into a nucleus in 

 repose ; Phase 5, approximation of the masculine and feminine nuclei, 

 each possessing two chromatic meshes ; Phase 6, formation of a mother- 

 star of the four chromatic meshes, two masculine and two feminine. 



would unfold itself to reconstitute the typical cell 

 of the species of its chromosomes. But the matura- 

 tion expels these four before the unfolding, as we 



