294 



RESEARCHES ON FUNGI 



Some more or less hemispherical fruit-bodies of Aleuria vesiculosa 

 were obtained from an open garden at the Manitoba Agricultural 

 College in October, 1925, and they were examined in the manner 

 just indicated. In each fruit-body, as shown in Figs. 139 and 140, 

 it was found that the asci at the base were straight and looked 

 directly upwards and that the asci on the sides were curved in such 



Fig. 141. — Aleuria vesiculosa. Semi-diagrammatic surface view of tlie hymenium 

 half-way up the side of a cupulate fruit-body (c/. Figs. 138 and 139). Asci 

 a and parapliyses b are turned upwards heliotropically so as to be directed 

 toward tlie source of the strongest liglit and, therefore, toward tlie fruit-body's 

 moutli. Magnification, 293. 



a way that their apices looked toward the fruit-body's mouth. 

 Every ascus which, owing to its position of origin, had developed in 

 unilateral light had, during its development, bent its free end toward 

 the fruit-body's mouth, i.e. toward the source of light. 



Surface views of the hymenium on the sides of more or less 

 hemispherical fruit-bodies have the appearance represented semi- 

 diagrammatically in Fig. 141, from which one may conclude once 

 more that all the asci point in the same general direction, namely, 

 toward the fruit-body's mouth. 



Radial-longitudinal sections from the sides of a more or less 



