— 141 — 



Fig. 14. Portion of an ascogoniura completely entwined by hyphae. The 

 naoleî in the cells are disposed equally. They are larger than in the young 

 ascogonia. X 950. 



Fig. 15. Same as previous figure. Later stage of develcpraent. Part of the 

 nuclei somewhat larger than the others. X 950. 



Fig. 16. Same as previous. Difference of size of the nuclei is very prominent,. 

 In the center of large nuclei strongly stained nucleolus. X 2000. 



Fig. 17—26. Podospora eurvula. 



Fig. 17. Conidial fruiting. X 950. 



Fig. 18. A perithecium. Through the sheath are зеек coils of the ascogonium- 

 (drawn from living specimen) X 950. 



Fig. 19. Part of hyphae of a germinating spore. Some nuclei lying in 

 pairs. X "ISOO. 



Fig. 20. Young, not yet entwined by hyphae, ascogonium. Binucleated 

 cell. X 1200. 



Fig. 21. A young ascogonium. Covering layer slightly yet developed. Part 

 of nuclei arranged in pairs. The difference in the sizes of the nuclei is di- 

 stinctly seen. X 1200. 



Fig. 22. Same as previous, more mature stage of development X 1200. 



Fig. 23. Same as previous. The number of nuclei in the cells have con- 

 siderably augmented in comparison to the figure 20. Part of nuclei in 

 pairs. X 1200. 



Fig. 24. Nuclei in pairs in the cell of the ascogonium. X 1200. 



Fig. 25. Cell of the ascogonium giving rise to the ascogenous hyphae. Large 

 nuclei not connected in pairs; they lie singly. X 1200. 



Fig. 26. Dividing nuclei in the cells of the ascogonium. X 2000. 



Fig. 27—30. Podospora anserina. 



Fig. 27. An ascogoniura. X 1200. 



Fig. 28. A young perithecium. The nuclei in the cells are foAv. X 950. 

 Fig. 29. Portion of an ascogenous hyphae with lying in pairs nuclei. X 950.- 

 Fig. 30. Ascus with 8 nuclei. Next to each pair of nuclei a clear zone, se- 

 parating the nuclei from the surrounding protoplasm. X ^90. 



Fig. 31—37. Podospora setosa. 



Fig. 31. Young ascogonium. Nuclei are very small. X 1200. 



Fig. 32. Cells of an ascogonium from a more mature perithecium. X 1500. 



Fig. 33. Small portion of an ascus with numerous nuclei. X 1200. 



Fig. 34. Same as previous. Great number of nuclei which look like stops. 

 The nucleolus in same are mostly imperceptible. X 2000. 



Fig. 35. Same. Nuclei with isolated portions of protoplasm, Avhich have 

 taken the shape of stretched out bodies. X 2000. 



Fig. 36. Same. Young spores Avith nuclei in polar position. X 2000. 



Fig. 37. Disposition of spores in an unmature ascus. X 1200. 



