322 Wisconsin Academy of Sciences, Arts, and Letters. 
Fig. 21. Two late prophasic longitudinally split chromosomes, showing 
halves closely pressed together. Chromosome pair evident 
at right of figure. Merkel’s fluid. Triple stain. 
Fig. 22. Late telophase stage. Inuclear vacuole forming. Yacuolation of 
chromosomes distinct in each, showing the appearance of 
longitudinal split and cross anastomoses. Flemming’s 
strong fluid. Triple stain. 
Fig. 22 a. Detail of the two left-hand chromosomes of the upper nucleus in 
figure 22. No central line of vacuoles appears in the left- 
hand chromosome, although the vacuolation of the right- 
hand chromosome might be so interpreted. 
Fig. 23. Cell showing reconstruction stages of the two daughter nuclei and 
apparent parallel arrangement of dispirem threads, but in 
reality showing stage in alveolation of chromosomes into 
irregular bands. Flemming’s strong fluid. Triple stain. 
Fig. 23a. Detail portion of the upper nucleus of figure 23 to show that the 
parallel aspect is only apparent. Figure 23& represents a 
similar condition. 
Figs. 24, 25. Prohpasic nuclei showing conditions which might be inter¬ 
preted as a parallelism of threads but in reality represent¬ 
ing stages in condensation of chromosomes comparable to 
that shown in figure 15. Flemming’s strong fluid. Triple 
stain. 
Fig. 25a. Detail of portion of nucleus shown in figure 25. Apparent parall¬ 
elism of chromatic portions of condensing chromosomes 
shown. 
