274 ANALES DE LA SOCIEDAD CIENTÍFICA ARGENTINA 



que atra; perithecia 5-20-aggregata, globulosa (400-450), e 

 mutua pressione angulosa, non v. vix prominula, disco (si per- 

 spicuo) applanato v. subumbilicato, ostiolo minutissimo, non 

 visibile nec papillato perforata, subcarboaacea,nigra; asci cylin- 

 dracei, ápice rotundati (p. sp. 70-75x8-9^ped. 25-30x2-3), 

 octospori, paraphysibus filiformibus deusissimis obvallati; spo- 

 rae recte monostichae, valide naviculares v. rarius elliptico- 

 rhomboideae (10-Hx6-7.5), utrinque obtusae, primo olivaceae, 

 pellucidae, grosse 4-2-guttulatae, dein opace fuligineae. 



Hab. Ad truncos decorticatos putrescente Quebrachiae Lorentzü 

 Grs. in sylvis subvirgineis prope Mbay, 17 Febr. 4882 (sub 

 num. 3419). 



Obs. Species externa facie formam depauperatam IJ. fusci (Prs.) 

 Pr. simulans, sed characteribus internis praedistincta. 



203. Hypoxylon intermedium Speg. (n. sp.) 



Diag. Endoxylon: Stromata primo epidermide tecta dein erum- 

 pentia v. cortice secedente nuda, matrici nigrificata innato- 

 effusa (3-5 cent, diam.), vix pulvinata ac undulatula, laxe gre- 

 garia V. confluentia, ambitu irregulariter repanda, intus extus- 

 que sordide fusco-atra, opaca, minutissime (vix oculo nudo) et 

 laxe punctulata, superficem Diatrype sligmatis (Hoífm.) Fr. in 

 mente revocantia ; perithecia elliptico-globosa (350-400 diam.), 

 monosticha, densissime constipata, atra, carbonacea, non pro- 

 minula, ostiolo papillulato e stromate breviter exerto donata; 

 asci cylindracei, ápice rotundati, basi breviter pedicellati (65- 

 75x7), paraphysibus paucissimis diffluentibusque inmixti, octo- 

 spori; sporae ellipticae, utrinque late rotundatae (9-10x6), 

 rectae v. vix inaequilaterales, oblique monostichae, opace oli- 

 vaceo-fuligineae. 



Hab. Ad ramos truncosque putrescentes in sylvis vetustis prope 

 Guarapi, Jul. 1881 (sub num. 2728). 



Obs. Species primo visu H. anthracoidiYr. (sec. Speg. Fung. Arg. 

 p. IV. n. 131) simillima, sed mox dignoscenda ostiolis promi- 

 nulis, sporisque utrinque rotiindato-obtusis. 



204. Hypoxylon subeffusum Speg. (n. sp.) 



Diag. Placoxylon ; stroma erumpens, matrice nigrificata insidens, 

 late ambiens (15-20 cent.=0,5-l mllm. crass.), elongato-repan- 

 dulum, modice pulvinato-undulatum, margine acutato-diffusum, 



