MOTTIER AND NOTHNAGEL: CHROMOSOMES OF ALLIUM 565 
Fic. 15. Multipolar stage of spindle. 
Fic. 16, 17. The fully developed spindle. Nearly all of the chromosomes are 
rings, 
Fic. 18. Spindle showing three chromosomes with the metaphase espa 
At the right a ring-shaped chromosome seen flatwise. In the center the two 
what curved members of the bivalent are stretched out tangentially upon the spin tlle e. 
The four free ends seen in these two chromosomes are indications of the longitudinal 
split. The chromosome at the left is a ring seen from the 
Fic. 19. An anaphase; the longitudinal fission of pies dicaghter chromosome 
is very evident. 
1G. 20. A polar view of an anaphase. The halves of the longitudinally split 
daughter segments tend to separate. 
Fic. 21. A typical anaphase in longitudinal section. 
Fic. 22. A polar view of a daughter nucleus showing arrangement of the  spirem 
into a system of loops. 
Fic. 23. One cell of a tetrad, or granddaughter cell. The disposition of the 
chromatin is the same as in the daughter cells at the corresponding stage. 
