Division in Mnium hornum. 
157 
Fig. 18. Spore-mother-cell with nucleus showing the thin spireme, x 1500. 
Fig. 19. Nucleus in early stage of first contraction, x 2250. 
Fig. 20, a and b. Two successive sections of a nucleus immediately before the first contraction, 
x 2250. 
Fig. 21. Cell with nucleus showing first contraction figure, x 1500. 
Fig. 22. Nucleus with spireme emerging from the first contraction, x 2250. 
Fig. 23. Nucleus showing the thick spireme, x 2250. 
Fig. 24. Nucleus showing spireme in second contraction, with radiating loops, in some of which 
longitudinal fission can be seen, x 2250. 
Fig. 25. Nucleus in early stage of diakinesis with differentiating chromosomes. X 2250. 
Fig. 26. Stage immediately before chromosomes pass on to the equatorial plate showing the 
faintly-staining nucleolus, x 1500. 
Fig. 27. Chromosomes on the equatorial plate; seen obliquely, x 1500. 
Fig. 28. Chromosomes dividing transversely on the spindle ; drawn at one focus only, x 1500. 
Fig. 29. Anaphase showing chromosomes just after division, x 1500. 
Fig. 30. Telophase, x 1500. 
Fig. 31. Telophase of homotype division, x 1500. 
Fig. 32. Resting nuclei after homotype division, x 1500. 
