2*74 ANALES DE LA SOCIEDAD CIENTÍFICA ARGENTINA 



Obs. Pileiis hemisphaericus (4-5 cent, diam.), centro late profun- 

 deque umbilicatus, glabratus v. laxe squamuloso-furfuraceus 

 ac sordide fuscus, anibitu subinvolutus late densissimeque stri- 

 goso-villosus et pallide fulvescens, submembranaceus, coriaceo- 

 rigidulus ; lamellae polymacriae, laxe confertae, membranaceo- 

 rigidae, mediocres (1,5 mllm. lat.), utrinque acutae, ac postice 

 regnlariter attenuato-decurrentes, acie subinfuscatae, primo 

 integrae dein minute bine inde fissae v. erosulae, ligneo-albe- 

 scentes ; stipes erectus, mediocris, subgracilis (2,5 cent. long. — 

 3-4 mllm. crass.), subteres, antice subabrupte in píleo expan- 

 sus, postice leniter gradatimque incrassatulus, iutus farctos, 

 fibrosus, ligneo-albus, extus sordide fuscus, minutissime puberu- 

 lo-velutinus x. saepius inferné laxe subvillosulo-furfuraceus. 



21. Lentinus (Scleroma) velutinus rr. = Epicr. Syst. Myc. p. 392. 

 Hab. Ad truncos dejectos putrescentes in sylvis subvirgineis pro- 

 pe Guarapi, Jan. 1882 (sub num. 3367). 



Qbs. Pileus cyathoideus v. infandibuliformis (5-6 cent, diam.), 

 submembranaceus, coriaceo-rigidus, erectus, cervinus v. rufe- 

 scenti-gilvus, ubique pruinuloso-velutinus, margine recto v. 

 laxe extus subrevoluto non v. parce undulatulo, integro v. hinc 

 inde fisso, velutino-hispidulo v. subciliolato ; lamellae polyma- 

 criae, confertissimae, strictissimae ^0,5-0,7 mllm. lat.), utrinque 

 acutato-attenuatae, acie integerrimae, membranaceo-rigidulae» 

 pileo concolores v. vix pallidiores, regulariter breveque in sti- 

 pite decurrentes ; stipes erectus, rectus v. basi plus minusve 

 incurvo-adscendens, teres v. deorsum leniter gradatimque in- 

 crassatulus, pro ratione gracilis (4 cent. long. — 3-5 mllm. crass.) 

 dense hispido-velutinus, pileo concolor v. obscurior, intus sub- 

 meduUose-farctus, albus, plus minusve ac subabrupte nodulose 

 incrassato-adnatus. 



Pileus senescens glabratus ac dense et minute (sed parum 

 manifesté) e centro ad marginem striatus ; pubescentia stipitis 

 Ínter lamellas breviter intransibique regulariter abrupteque eva- 

 nescens. 



22. Lentinus (Scleroma) fallax Speg. (n. sp.) 



Diag. Pileus subhemispbacrico-ínf undibulif ormis (7-8 cent. diam.) 

 submembranaceus, coriaceo-rigidulus, canescenti-fulvus, cen- 

 tro fuscescens ac minute adpresseque subsquamuloso-furfura- 



