128 FUNGUS-FLORA. 



oblong-elliptic, filled with coarsely grained protoplasm, 

 sometimes becoming muriform, 18-23 x 9-12 p.; paraphyses 

 slenderly filiform, abundant. 



Stylospores oblong-elliptic or elliptic, 10-20 x 7-9 /u, 

 produced on the surface of the stroma in tufts between the 

 ascophores or clavate sporophores. 



Dermatea fagi, Phil., Brit. Disc., p. 344. 



Dermatella (Dermina) fagi, Sacc., Syll., viii. n. 2033. 



On Fagus sylvatica. 



The ascophores are --| a line broad. The conidia are 

 produced in such quantity as to form a pale stratum visible 

 under a pocket lens. (Phillips.) 



If the spores are truly muriform at maturity, the present 

 species would form the type of a new genus, which, following 

 custom, would be called Dermina, the name used by Saccardo 

 for the subgenus of Dermatella having the spores muriform. 

 Phillips speaks of the spores, "sometimes becoming muriform," 

 but nothing is said about transverse septation, which usually 

 precedes the muriform arrangement. 



TYMPANIS. Tode. (figs. 45-47, p. 91.) 



Ascophores erumpent, becoming superficial, usually in 

 dense clusters and originating from a common stroma, at 

 first closed then expanding, the disc becoming almost or 

 quite plane, somewhat horny, blackish or brown, sometimes 

 powdered with meal outside ; excipulum formed of densely 

 interwoven hyphae ; asci cylindric-clavate, wall thick, spores 

 hyaline, continuous, very minute, innumerable, in some 

 species eight large spores are present along with the minute 

 ones ; paraphyses present. 



Tympanis, Tode, Fungi Meckl., i. p. 23 ; Phil., Brit. Disc., 

 p. 351 ; Kehm, Krypt.-Flora, Disc., p. 264; Sacc., Syll., viii. 

 p. 578. 



Growing on branches, bark, &c., usually on living trees. 

 Eeadily distinguished by the innumerable, minute spores 

 contained in the thick-walled ascus. 



Tympanis conspersa. Fries, Syst. Myc., ii. p. 175. 

 (figs. 45-47, p. 91.) 



Erumpent, 20-40 ascophores densely crowded and origi- 



