Cytology of the Ascomycetes . 477 
Fig. 6. Chromosomes ; longitudinal fission visible in the limbs, x 2800. 
Fig. 7. Fleterotype metaphase, x 2800. 
Fig. 8. The same ; later stage, x 2800. 
Fig. 9. Anaphase, x 2800. 
Fig. 10. Telophase, x 2800. 
SECOND DIVISION. 
Fig. 11. Homotype metaphase, x 2800. 
Fig. 12. Anaphase; lower spindle cut obliquely, x 2800. 
Fig. 13. Telophase, x 2800. 
THIRD DIVISION. 
Fig. 14. Brachymeiotic contraction, x 2800. 
Fig. 15. Later prophase, x 2800. 
Fig. 16. Later prophase, x 2800. 
Fig. 17. Metaphase, x 2800. 
Fig. 18. Early anaphase, showing radiations passing out towards nucleolus, x 2800. 
Fig. 19. Anaphase, x 2800. 
Fig. 20. Telophase, x 2800. 
Figs. 21-47, Peziza vesiculosa. 
Fig. 21. Equatorial plate in ascogenous liypha ; formation of crozier. x 2600. 
Fig. 22. Telophase in ascogenous hypha ; the plane of section is probably at right angles to 
the crozier. x 2600. 
Fig. 23. Nuclear fusion in ascus. x 2600. 
FIRST DIVISION. 
Fig. 24. First contraction of the chromatin, x 2600. 
Fig. 25. Longitudinal fission of spireme, x 2600. 
Fig. 26. Synaptic stage, x 2600. 
Fig. 27. Early stage of spindle formation ; heterotype chromosomes formed ; part of the nucleus 
has been cut away, x 2600. 
Fig. 28. Spindle lying across shorter axis of nucleus ; eight chromosomes present, x 2600. 
Fig. 29. Early metaphase, x 2600. 
Fig. 30. Anaphase, x 2600. 
Fig. 31. Telophase, x 2600. 
Fig. 32. Reconstruction of daughter-nuclei, x 2600. 
SECOND DIVISION. 
Fig- 33. Contraction of chromatin, x 2600. 
Fig. 34. Metaphase, showing four chromosomes, x 2600. 
Fig- 35. Anaphase, x 2600. 
Fig. 36. Telophase, x 2600. 
THIRD DIVISION AND SPORE FORMATION. 
Fig. 37. Contraction of chromatin, x 2600. 
Fig. 38. Metaphase, showing four chromosomes, x 2600. 
Fig. 39. Anaphase, x 2600. 
Fig. 40. Telophase ; lower nucleus in polar view, x 2600. 
Fig. 41. Slightly later telophase ; astral rays increasing in prominence, x 2600. 
Fig. 42. Later stage, beginning of delimitation of spore, x 2600. 
Fig. 43. Spore formation ; appearance of nuclear beak, x 2600. 
Fig. 44. Ascus, showing arrangement of vacuoles; reconstruction of nuclei almost complete; 
spore formation further advanced, x 2600. 
Fig. 45. Upper part of spore clearly delimited ; lower part not yet defined, x 2600. 
Fig. 46. Young paraphyses. x 260c. 
Fig. 47. Older paraphysis, showing vacuolate and disintegrating nuclei, x 2600. 
K k 2 
