2 art. 3. — SEiicHi kawamura: 



having been given long ago by Leveille to ariothor luminous 

 fungus 15 of the same genus from Manila. So that, Inoko's designa- 

 tion can not be kept on. Hennings 2) in 1900, as he gave an 

 enumeration of Japanese fungi, put forth the species under the 

 name of Pleur otus oleareus D.C., which example was followed by 

 some later authors. As a matter of fact, the identification with 

 that common European species can not be supported, as will soon 

 be pointed out.. 



Since September 1909, I have had frequent occasions to collect 

 fresh specimens of the fungus in question, and thus to make 

 studies on it, the results of which I propose to report in this 

 paper. The large size of the species and the abundance of its 

 occurrence have greatly facilitated my observations. 



Before proceeding farther, I take pleasure in acknowledging 

 my deep obligations to Professor Miyoshi, under whose direc- 

 tion the work was carried on. I wish also to express my 

 thanks to Professor Ijima for his aid in the preparation of this 

 report. 



II. Characters of Pleurotus japonicus sp. nov. 



Diagnosis. — Pileo carnoso, molli, conchato, dimidiato, firmo, elastico, 

 sursum incrassato, basi non-stigoso ; lamellis breve decurrentibus, sub- 

 distantibus, albis ; sporae globasae et magnae ; ad truncos praecique 

 Fagi ; venenata. (Pis. I & IE.) Nom. Jap. — Tsukiyo-také ; Kuma-bera ; 

 Watari. 3 > 



Description (Pis. I à II.). — Pileus convex to expanded, more 

 or less depressed at attachment to stem, the older ones with 

 involute margin ; the surface floccose at first, afterwards floccose- 



1) Pleurotus noctUucens Lev., (Ann. d. Sc. Nat. Oct. 1844, p. 171.) 



2) Hennings, P., Fleischige Pilze aus Japan, (Hedwigia, Vol. XXXIX, 1900, p. 156.) 



3) This should be the local name of the fungus in the Province of Yamato, according to 

 the old story book "Konjaku-monogatari." 



