605 
Gnomonia erythrostoma, Pers. 
Fig. ii. Central portion of ‘ coil ' showing ascogonium. x 2,500. 
Fig. 12. Trichogyne not connected with a ‘coil’, x 1,800. 
Fig. 13. Proliferation of trichogynes. x 680. 
Fig. 14. ‘Coil’ cut parallel to leaf surface (only a portion drawn; a = ascogonial cells, 
b = vegetative cells, cells not drawn are like b). 
Fig. 15. ‘ Coil ’ in resting state, x 680. 
Fig. 16. ‘ Coil’ in resting state (central part only drawn), x 1,800. 
Fig. 17. Early stage in development of perithecium. x 680. 
Fig. 18. Differentiation of ascogenous cell from a vegetative cell. X 2,500. 
Fig. 19. Nuclei of young ascogenous cells (other line represents position of perithecial wall). 
X 2,500. 
Fig. 20. Ascogenous cell towards base of perithecium. x 2,500. 
Fig. 2i. Conjugate division, x 2,500. 
Fig. 22. Ascogenous cell and young ascus. x 2,500. 
Fig. 23. Ascogenous cell with ascus nucleus, x 2,500. 
Figs. 24-26. Stages in formation of asci. x 2,500. 
Fig. 27. Nuclear fusion, x 2,500. 
Fig. 28. Contraction of net-work in ascus nucleus, x 2,500. 
Fig. 29. Ascus nucleus at stage in which net-work stains with difficulty, x 2,500. 
Fig. 30. Chromosomes of first division before their arrangement on spindle, x 2,500. 
Figs. 31-33. First nuclear division. 
Fig* 34* Separate chromosomes of first division, x 2,500. 
Fig* 35* Telophase of first division, x 2,500. 
Figs. 36, 37. Binucleate stage (only part of ascus drawn), x 2,500. 
Figs. 38, 39. Second division, telophase, x 2,500. 
Figs. 40, 41. Quadrinucleate stage (only two of the four nuclei fully drawn in Fig. 40). 
X 2,500. 
Fig. 42. Third division, metaphase, x 2,500. 
Fig. 43. Third division, anaphase, x 2,500. 
Fig. 44. Third division, telophase, x 2,500. 
Fig. 45. Division in spore, x 2,500. 
Fig. 46. Ascus after formation of spores, x 680. 
S S 3 
