242 



RESEARCHES ON FUNGI 



angle of aperture of these and of other mature apothecia was about 

 50°. Within, the apothecia are rather pointed at the base and never 

 well-rounded hke those of Galactinia badia, Aleuria vesiculosa, etc. 



Fig. Ill .—Sarcoscypha protracta. To show the exact forms of the cups in particular 

 fruit-bodies. A, a yoving unexpanded fruit-body, seen from above. B, the 

 same, seen in vertical section : the hymenium lining the inner surface of the 

 cavity contains young asci which as yet have not developed any spores. C, a 

 mature fruit-body seen from above : the cup is fully expanded and the hymenium 

 contains asci enclosing ripe spores. D-I, vertical sections through six fully 

 expanded fruit-bodies which had discharged, or were about to discharge, their 

 spores. D and G had already shot away all their spores. The angle of aperture 

 of the cup is smallest in D and largest in I. Several of the fruit-bodies were 

 observed to puf? in the laboratory. Fruit-bodies obtained in a Poplar wood at 

 Winnipeg, Manitoba. Magnification, 2- 6 natural size. 



Moreover, they never open out in such a manner as to flatten the 

 hymenium. 



At A and B in Fig. 118, enlarged six times, is shown a diagram- 

 matic drawing of a vertical section through an average cup. The 

 cup is 8 mm. deep and has an angle of aperture of 50°. The asci in 

 the hymenium have straight shafts and are arranged perpendicularly 

 to the surface of the hymenium. The arrows indicate in A the 



