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NOVA ASCOMYCETUM GENERA. 

 By P. A. Saccardo. 



I. Fracchiaea. Sacc. Myc. Yen. 115, tab. xii. f. 3 — 7. 

 Perithecia carbonacea, aggregata, rai'o subsparsa, erumpentia, v., 



cortice delapso, superficialia, uiacula stromatica nigricantc insiden- 

 tia, orstolo brevissirao denique umbilicato. Asci polyspori, para- 

 physibus nullis. Sporidia vaLsea, i.e., cylindracea utrinque rotun- 

 data, curvula, hyalina. Spermatia, iuperitheciis ascoplioris juveni- 

 libus, minima, cylindracea, cm-vula, byalina. 



Species : Fracchicea hctenujenea, Sacc, 1. c. et Mycoth. Ven. I., 

 No. 88, 



Obs. Genus peraffine Coelosphceriw, Sacc. (= Nitsclikiaj Otth.), 

 a quo inprimis ascis polysporis recedit. 



II. Thyridaria. Sacc. Mycoth. Ven. II., No. 170. 

 Perithecia cai'bonacea, aggregata, raro subsparsa, crusta stroma- 

 tica nigricante subcorticali insidentia et cum ea in acervulos sub- 

 Talseos connexa, tecta, dein saepe erumpenti-liberata. Asci 

 octospori parapliysibus copiosis obvallati. Sporidia oblongata, 

 plurilocularia (nou muriformia) fuliginea. Status pycnidicus et 

 niicropycnidicus cogniti. 



Species : Thyridaria incmstans, Sacc. 1. c. Cucurhitaria Broiis- 

 807ietice, Sacc. Myc. Ven. 118, t. xii., f, 12-17. 



Obs. Genus stromate manifestisslmo instructum, Thyridio affine, 

 a quo praecipue sporidiis non muriformibus dignoscitur. 

 III. Thyronectxia. Sacc. 



Perithecia ceraceo-membranacea, contextu vubescente, subdia- 

 phano nectriacea, in cortice nidulantia ibique in acervulos valseos 

 aggregata, tecta v. tandem erumpentia, ostiolis papillatis, brevibus. 

 Acci octospori, paraphysati. Sporidia oblonga, v. ovoidea, initio 

 transverse et longitudinaliter pluriguttulata dein tenuiter murifor- 

 mia, hyalina. 



Species : Thyronectria Patavina, Sacc. (edenda). 



Obs. Genus ob contextum perithecis et sporidia diaphana ad 

 Nvctriam v. Calonectriam vergens, ob stromata immersa, valsea et 

 ob sporidia muriformia ad Thyridiimi accedens, inter utrumque 

 medium. 



IV. Fassexinula. Face. 



Perithecia meml>ranaceo-mollia, pallida, in stromate v. in peri- 

 theciis pyrenomycetum majorum (ex. gr. Thyridii et Valsar'ice) 

 omnino immersa, nunc inordinate aggregata, nunc discreta, globosa, 

 minuta; nucleo farcto candido ; ostiolis cylindraceis, plus minus 

 alte exertis, incurvis, albidis. Asci octospori, paraphysati. Sporidia 

 oblonga v. ovoidea, 1-septata et ob guttas duas septo utrinque 

 appositas simulate 3-septata, dilute fuliginea. 



Species: Passerimda Candida, Sacc (edenda). 



Obs. Genus, Nectriaceis subaffine, egregio mycologo T. Pas- 

 Berini in Parmensi Universitate Botanices Professori dicatum ; quod 



