pellucid. The type specimen is largely resupinate, but has a free, 

 pileate development and is surely not a Poria, as compiled in Sac- 

 cardo. Neither can it be classed as Irpex, as has been proposed. 



MKRULIUS CASTANEUS (Fig. 761), FROM J. UMEMURA, 

 JAPAN. Resupinate, closely adnate, no distinct margin, uniform, 

 dark chestnut brown. Hymenium meruloid with large, shallow 

 pores (Fig. 762 enlarged). Tissue of deeply colored, rigid hyphae. 



Fig. 761. 



Merulius castaneus. 



Fig. 762. 



. enlarged six diamete 



Hymenium layer about 150 mm. thick, subhyaline, consisting of 

 intricate, rigid, subhyaline hyphae, with free projecting ends. Spores 

 (conidial ?) globose, 3-5 mic. smooth, hyaline. Basidia not found. 

 The dried specimen might be classed as a shallow pored Poria, 

 but when soaked out it is decidedly meruloid. It may have a name 

 somewhere as a Poria, but if it has I do not know it. Received from 

 J. Umemura, Japan, No. 120 (twice) and No. 134. 



STEREUM ALBIDUM (Fig. 763), FROM A. YASUDA, 

 JAPAN. Pileus white, thin, spathulate or reniform, with a short, 



I lateral stipe, 3-4 x 1-2 cm. Surface smooth, 



Jijjjt with minute pubescence under a microscope. 

 '' j^m Cystidia none, but a few slender, projecting, 

 ^HF hyaline hyphae. Spores globose, 3 mic., 

 ^y^ij. hyaline, smooth. 

 This belongs to Section 9 and is the only 

 V species in the section that remains white in 



jj|^ drying. It is quite close to Stereum dia- 

 .jfglijip phanum (in Section 2), which however, is 

 always infundibuliform. The spores de- 

 F ' 9 ' 763 ' scribed may be only the conidial spores, for 



I find also large (10 mic.) globose, minutely rough spores, which may 

 be the basidial spores, but I take them to be accidental. 



555 



