76 ANALES DE LA SOCIEDAD CIENTÍFICA ARGENTINA 



cent, alt.), tenui-membranaceus, suporne minutissime radiatim 

 fibrosas, non v. vix hiñe inde sparse snbvelutinns, subsericeo- 

 nitens, fulvescens v. e fulvo dilutissime purpurascens; inferné 

 sordide pallideque subflavescens, opacus, saepe laxissime minu- 

 tissime ruguloso-reticulatus, margine latiuscule sterile, sub- 

 pellacido, integro v. leniter undulato-repando, plus minusve 

 dense fimbriato-soluto ; stipes rectus, teres (0,5-1 cent, long, 

 — \ mllm. crass.), bymenio concolor, subfarinosus, basi fibrosa 

 radiatim expansus, ac fere scutato-adnatus, ambitu indeter- 

 minatus. 



f. craterelloides (sub num. 3356). 

 Obs. Pileus calyciformis, majusculus (3-5 cent. diam. — 3-4 cent. 

 alt.), integer, superne laevissimo, glaberrimo, fulvescenti-fu- 

 scus, azonus vix v. non nitens, inferné sordide ex albo v. ñavo 

 carneus, dense et plus minusve manifesté reticulato-venulosus, 

 fere ut reticulum Merulii cujusdam, margine saepe latissime 

 (3-5 mllm.) sterili, dense undulato-crenulato, integro v. vix 

 denticulato-fimbriato ; stipes curtus, crassiusculus, (0,5 cent, 

 long. — 1,5 mllm. crass.), sordide albescens, farinosulus, basi 

 late dilatato-adfixus. 



68. THELEPHORA (Pleurotus) VENUSTULA Speg. (n. sp.) 



Diag. Alba (in vivo) ; pilei membranacei, obovato-v. spathulato- 

 elongati, antice rotundati, postice attenuato-cuneati f2-2,5 

 cent. long. — 1 cent, diam.^, saepius plures lateraliter con- 

 fluentes, applanati, verticales, superne (dorso) glaberrimi, lae- 

 vissimi, non v. vix ñabellatim fibrosuli pallide carneo-fulve- 

 scentes ac subpellucidi (in sicco), non v. vix obsoletissime con- 

 centrice zonati, margine tenuissimo, repandulo-sublobato, plus 

 minusve lacero-fisso, inferné (hymenio) albi, glaberrimi, fla- 

 bellatim minute ac dense rimosuli ; stipes brevis (4-5 mllm. 

 long. — 0,8-1 mllm. crass.), farinosulo-velutinus, sordide ex 

 albo subfulvelli, rigiduli_, teretes, basi parce dilatato-adfixi. 

 Hab. Ad ramos dejectos putrescentes in sylva subvirginea Caá- 

 guazú, Jan. 1882 (sub num. 3354). 



69. Craterellus (Merisma) sparassoides Speg. (n. sp.) 



Diag. Dense fasciculato-coespitosus ; piléi e basi longe attenuato- 

 cuneata flabellato-spathulati (4-5 cent. long. — 3-4 cent, lat.), 

 erecti, membranaceo-leuti, subrigiduli, glabri (sub lente valida 



