274 



Mycologia 



Explanation of Plate 19 



All drawings were outlined and as many as possible of the details put in 

 with the aid of the camera ludica. The reduced magnification can easily be 

 calculated from the scale given with each group. 



Figs. 1-3. Hyphae showing nature of contents, septation and manner of 

 branching. 



Fig. 4. Sketch of fructifications. 



Figs. 5-15. Conidiophores showing various types of fructifications found 

 in potato glucose agar plates. 



Fig. 16. Conidia grown in starch agar plate. Drawing made from water 

 mount. 



Fig. 17. Conidia grown on potato glucose agar. Drawing made from 

 material stained with alcoholic carbol fuchsin and mounted in balsam. 



Fig. 18. Conidial germination in a 20-hour old potato glucose agar cul- 

 ture at 28 0 C. 



Fig. 19. Beginning stages in perithecial development. 



Fig. 20. Microtome section of a cluster of perithecia grown on steamed 

 rice. The letter " a " locates the inner, " b " the middle and " c " the outer . 

 layers of the peridium. 



Fig. 21. Microtome section of small perithecia grown on potato glucose 

 agar in petri dish. 



Fig. 22. The portion marked " x" of Fig. 21 much more highly magni- 

 fied. Note the character of the peridium and the clusters of ascospores 

 among the fertile hyphae. 



Fig. 23. Swollen hyphae from the center of a young perithecium. 



Figs. 24-29. Asci and hyphal attachments. 



Figs. 30-34. Asci containing ascospores. 



Fig. 35. Ascospores highly magnified. Note the spines on the walls. 

 Drawing made from spores stained with alcoholic carbol fuchsin and mounted 

 in balsam. 



Fig. 36. Ascospores germinating in a 24-hour old culture of beef peptone 

 agar kept at 28 0 C. 



Fig. 37. Camera lucida sketch of 48-hour old colony on beef petone agar. 

 This colony grew from an ascospore. 



