A critical study of the cytoLogy of Crepis virens. 
143 
Fig. 29. Polar view of an early anaphase. The daughter halves of the small 
chromosome have already separated from one another, whilst those of the two larger 
chromosomes are in process of separating. 
Fig. 30. Early telophase of the last archesporial division. 
Fig. 31. Late telophase of the last archesporial division, showing the dissolution 
of the chromosomes into small, and more or less uniformly sized, chromatic beads, scat- 
tered in a very fine reticulate linin. Figs. 31 — 45 illastrate the grad ial transition into 
the ‘rest’ between the last archesporial telophase and the heterotype prophase. 
Fig. 32. Later stage in which the chromatin is coilecting into definite groups 
leaving the linin as a sharply defined reticulum. 
Fig. 33. The chromatin is becoming increasingly concentrated into large chro- 
matic beads. 
Fig. 34. Concentration of the chromatic nuclear contents procceds, leaving the 
linin as a more or less colourless reticulum. 
Figs. 35 and 36. The chromatic bodies become fewer in number as the nuclei 
pass into the premeiotic rest. 
Plate IX. 
Figs. 37 and 38. As the chromatin concentrates into fewer aggregations these 
bodies become larger, more definite, and more deeply staining. 
Fig. 39. Shows a nucleus going into rest with seven definite chromatic bodies. 
Fig. 40. The chromatic bodies are reduced in number, but smaller chromatic 
granules are scattered in the reticulum. 
Fig. 41. A nucleus with three bodies and a few chromatic granules. 
Fig. 42. Completely resting nucleus showing two definite chromatic bodies and 
a possible third which is in dose association with the nucleolus. The linin is a color- 
less and fine reticulum. 
Fig. 43. Nucleus with apparently six chromatic bodies, one of which is closely 
associated with the nucleolus. 
Fig. 44. Nucleus with four chromatic bodies, one of which shows a paired ar- 
rangement. 
Fig. 45. A nucleus with three definite bodies and one which is more faintly 
staining. 
Fig. 46. Heterotype division : In the chromatic body situated to the north of 
the nucleolus the first indication of a split is dsible, causing the body to be slightly 
V shaped. 
Fig. 47. Chromatic bodies showing two stages in the process of Splitting. In 
the one case the two halves are merely separated by a light area and are V shaped; 
in the other they are disposed to one another as the arms of an x. 
Fig. 48. The two split sides of one of the chromatic bodies appear as rods with 
a small space between them. 
Fig. 49. Two of the chromatic bodies have split, and the rounded sides lie closely 
approximated to one another. A thread passes to each of the halves, and the two threads 
run parallel to one another. 
Fig. 50. In the right portion of the nucleus a split chromatic bödy is seen which 
has apparently also segmented transversely, and the segments of each side are con- 
nected by parallel threads, this shows the beginning of the breaking up of the daughter 
halves of the chromatic bodies prior to synapsis. 
