552 Reginald Ruggles Gates. The Stature and Chromosomes etc. 
Fig. 5. Anaphase of heterotypic mitosis. Sliglitly oblique cut, showing 
14 chromosomes at one end of spindle. No indications of a split in these chro- 
inosomes. Nucleolus at side of spindle. 
Fig. 6. Later anaphase. Many of the chromosomes show their bivalent 
nature. The split in nearly all these is apparently a transverse one. It is pos- 
sible, though it does not seem probable, that this is due to a change in the 
orientation of the chromosome in every case. 
Fig. 7. Early telophase, in whic-h the chromosomes are beginning to as- 
sume various shapes in the daughter nuclei. Three chromosomes are left behind 
and a nucleolus is also present. 
Fig. 8. Late telophase of heterotypic mitosis. The 14 chromosomes pre- 
sent nearly all show their bivalent nature, assuming the shapes characteristic 
of heterotypic chromosomes in many forrns. Some of the chromosomes liave 
already begun to Stretch out. becoming less compact and paler staining. 
Fig. 9. Later stage of interkinesis, in which the chromosomes have ana- 
stomosed so that in most cases their boundaries are no longer distinguishable. 
This stage probably does not always oecur. 
Fig. 10. Prophase homotypic mitosis, showing 14 bivalent chromosomes, 
all consisting of two closeh’ connected halves, in one of the daughter nuclei. 
The nnclear membrane has just disappeared and the multipolar spindle is being 
forrned by the wefts of fibrillae which surrounded the membrane being drawn 
out to a point at certain places on the periphery of the nucleus. 
