Daldinia concentrica. J. S. Bayliss Elliolt. 273 



atmosphere these germinate and the stroma becomes studded 

 over with Uttle white tufts of mycehum which appear to issue 

 from the mouths of the perithccia: and in some instances this 

 is the case for stromata which had apparently discharged all 

 their ascospores were examined and some of the few ascospores 

 which had not been set free had germinated inside the perithecia. 

 These tufts in the course of a few days become covered with 

 conidia ; on detached ripe fruit bodies kept in a moist atmosphere 

 under a bell jar these tufts always appear but in the open are 

 rarely seen except on logs lying in very sheltered places. 



In conclusion I wish to express my great indebtedness to 

 the late Professor G. S. West for the loan of books of reference. 



DESCRIPTION OF PLATE VI 

 Fig. 



31. Conidia and conidiophores from bark of ash log infected 



with Daldinia concentrica. 



32. Small portion of ascospore tendril which has exuded from 



a perithecium. 



33. Conidiophores and conidia from hanging drop culture of 



ascospores. 



34. Section through a few exterior zones of a perithecial stroma, 



showing an outer layer of distinctly formed perithecia, 

 and inner zones where previously formed perithecia are 

 seen in various stages of distinctness. 



35. Conidiophores bearing conidia growing on bark. 



36. Perithecial stromata appearing on a patch of conidio- 



phores. 

 ^y. Tendrils of ascospores arising from the mouths of perithecia 

 which were rapidly discharging their contents in a still 

 atmosphere. 



38. Sections of very young perithecia. 



39. Section of perithecium somewhat older. 



3—2 



