242 ANALES DE LA SOCIEDAD CIENTÍFICA ARGENTINA 



subglobosi, e mutua pressione tortuoso-sinuosi, saepe confluen- 

 tes, ostiolo minuto, non papillato donati, núcleo albo farcti ; 

 asci cylindraceo-subfusoidei, antice truucato-rotundati, crassis- 

 simeque tunicati, luce refracta 1-foveolati, postice attenuato- 

 pedicellati (p. sp. 50 X 10 = ped. 20), octospori, paraphysibus 

 filiformibus laxissime obvallati ; sporae ellipticae, utrinque ro- 

 tundatae v. plus minusve obtusatae (12 X 5), non v. grosse 

 1-guttulatae, in ascis oblique monosticbae v. disticliae. 

 Hab. Ad folia, petiolos nec non ramulos Sapindaceae species cu- 

 jusdam in sylvis prope Guarapi, Sept. 1882 (sub num. 3748). 



270. Phyllachora opaca Speg. (n. sp.) 



Diag. Maculae millae v. vix- manifestae, pallescentes ; stromata 

 plus minusve dense sparsa, irregulariter suborbicularia (0.5-2 

 mllm. diam.), e lenticulari applanata, matrici innata, epiphylla 

 V. amphigena, glabra, laevia (vix sub lente validissima obscure 

 punctulata), atra, opaca, extus atro-carbonacea, intus fusco- 

 fuliginea, contextu indistincto ; loculi densissime constipati ex 

 ovato elliptici, minuti (100-150 diam.), núcleo albo farcti; asci 

 fusoideo-cylindracei, antice truncati, postice breviter crasseque 

 attenuato-stipitati (80-85x6-8), octospori, aparapbysati v. 

 vix paraphysibus nonnullis filiformibus, simplicibus obvallati ; 

 sporae ellipticae, non v. vix ovoideae, utrinque plus minusve 

 acutiuscule rotundatae (10 X 4-4,5), oblique monosticbae, hya- 



linae. 

 Hab. Ad folia viva Myrtaceae cujusdam in sylva subvirginea Caá- 

 guazú, Jan. 1882 (sub num. 3431). 



271. Phyllachora? palmicola Speg. (n. sp.) 



Diog. Maculae parum manifestae saepe totum foliiim ambientes 

 expallentes, circa stromata saepe fuscescentes ; stromata innato- 

 immersa, tecta, vix e parenchymate tnmefactulo manifesta, 

 atra, subcarbonacea, contextu indistincto ; loculi stromate im- 

 mersi, globulosi (90-100 diam.), ostiolis crassis superficem epi- 

 dermidis attingentibus ac leniter papillato-prominulis, laevibus 

 matricem, supra stromate, minute ac confertiuscule atro-granu- 

 loso-punctulatam ef ficientibus, ápice obtusis v. applanatis, perfo- 

 ratis donati, núcleo mucoso albo farcti; asci clavati, antice obtu- 

 sati, postice attenuato-pedicellati (p. sp. 52 X 15-20 = ped. 

 20-25 X 5), parapbysibus filiformibus densiusculis obvallati, 



