Durand : Classification of the Fleshy Pezizineae 473 



ulose. At other places the threads are thin and narrow and coal- 

 esced with other hyphae. In all cases the hyphal nature is evident. 

 The whole tissue resembles closely that found in certain layers of 

 the last species described. 



ACETABULA VULGARIS Fuckel 



The Acetabulas are cup-shaped, fleshy plants, provided with a 

 short, thick stalk, the surface of which is marked by longitudinal 

 ridges, which branch more or less, and continue on the lower sur- 

 face of the cup. 



The sterile portion of A. vulgaris is differentiated into three 

 well marked regions. The hypothecium is about 75 fx thick and 



6- 



in diameter. A 



the remaining thickness is made up of coarse hyphae rather loosely 

 interwoven. This grades off into the hypothecium above and the 

 cortical layer below. The latter is pseudo-parenchymatous, being 



composed of cells 50-75 jx in diameter with thin walls, and more 

 or less elongated toward the surface, where some are prolonged, 

 giving to the exterior a scurfy appearance. 



Geopyxis cupularis L. 



Geoyp. 



having the stem smooth. In the species under consideration the 

 excipulum is quite thick, occupying about one half of the total thick- 

 ness of the sterile part. It is composed throughout of rounded or 

 irregularly polygonal cells with thin walls. Those at the surface 

 are rather large, measuring 15-30// in diameter. Toward the 

 inner side they become gradually smaller and grade off into the 

 coarse, loosely interwoven hyphae of which the hypothecium is 

 composed. 



Galactixia succosa Berk. 



The Galactinias are fleshy, cup-shaped, and sessile, but have the 

 peculiarity of exuding a milky juice when wounded. In the present 

 species the hypothecium is composed of rather large, loosely in- 

 terwoven hyphae, which give rise on the upper side to the asci and 

 paraphyses. The excipulum consists of two layers. The external 

 one consists of large loosely interwoven hyphae forming a layer 



