A critical study of the cytology of Crepis virens. 
121 
(46) has described (p. 72) and figiu’cd (PI. 1, fig. 27) a “Querteilimg der 
Chromosomen” in the anaphase of the homotype division. 
Many brightly staining refractive bodies are scattered in the cyto- 
plasm aronnd the spindle and the daughter nuclei (figs. 86 and 87). 
Telophase of the heterotype division. 
The chromosomes, having massed together in the manner charac- 
teristic of a late anaphase (fig. 86), begin once tnore to separate from 
one another, and to extend towards the periphery of the nucleus, the clear 
nuclear cavity being sharply distinguished from the denser cytoplasm. 
They become beaded and show beautiful fission in their substance (figs. 88 
and 89). Sometimes the fission divides two beaded sides (figs. 88 and 89), 
or it may divide two fine Strands joined at intervals by large beads of 
chromatin (fig. 89), precisely as is sometimes seen in the Separation of the 
univalent Strands after second contraction (PI. IX, fig. 76). 
By this time one nucleolus has generally made its appearance in either 
daughter nucleus. 
Fine connecting thi’eads join the portions of dissolving chromosomes 
to one another (PI. X, fig. 89). There is only a partial dispersion of these 
portions, for they immediately proceed to reconcentrate in preparation 
for the homotype division (fig. 90). There is no interkinetal rest. 
Second meiotic division. 
The passing of the heterotype telophase into the prophase of the 
homotype division can be recognised by the gradual disappearance of 
the spindle fibres of the heterotype mitosis, and by the elongation of the 
axes of the daughter nuclei, at right angles to the plane of the previous 
division (fig. 90). 
Prophase. 
The homotype prophase shows the concentration of the split frag- 
ments of the chromosomes derived from the heterotype telophase. Con- 
stantly a space remains between the concentrating portions (fig. 90), 
and represents the future line of fission between the daughter chromo- 
somes 011 the honiotype spindle. 
The chromosomes are evolvcd in portions as in the heterotype (see ^ 
page 120), and archesporial (see p. 108) prophases. Sometimes it is not 
possible to recognise the limits of the three chromosomes even though 
the spindle fibres may be indicated (fig. 91). Fission, separating the 
condensing daughter chromosomes, is not apparent during the later stages 
of concentration (fig. 91). 
