64 Journal of Mycology [Vol.13 



[Phycomycetae.] 



PvTiiiACYSTis R. E. & E. H. Smith, n. g, Saprolegniales. 

 Botanical Gazette 42:221. f. 1-3. 1906. 



"Parasitic on living plants, or saprophytic with abundant 

 moisture. Fertile mycelium delicate, septate, with numerous, 

 terminal, sympodially developed sporangia. Aquatic mycelium 

 typically sterile, with occasional conidia or sporangia. Filaments 

 \tvy large and vigorous, continuous, much branched. 



Sporangia typically rounded or ovate, dividing internally 

 into biciliate swarmspores which immediately become motile and 

 emerge from a terminal opening. 



Conidia similar to sporangia, germinating directly by a germ 

 tube. 



Sexual reproduction not observed. 



Differs from Pythium in mode of swarmspore formation, 

 and from Pythiopsis in habit ; closely intermediate between 

 Saprolegnieae and Peronosporeae." 



[Phycomycetae.] 



SiROLPiDiuM Petersen, n. g. Holochytriaceae. Oversigt over 

 det Kongelige Danske Videnskabernes Selskabs Forhandlinger, 

 1905 :478. f. 9. 1905. 



"Chytridinees endophytes sans mycelium ni radicelle. 

 Zoosporanges olpidioides formes soit par le developpement direct 

 de zoospores soit par la division des corps sporangiformes (thalle, 

 mycelium primitif). Les sporangcs formes de la derniere se 

 dissocient vite. Stades immobiles inconnus." 



IV. ASCOMYCETAE. 



[Ascomycetae.] 

 AcERRiELLA Saccardo, n. g. Sphaeriaceae. Sylloge 



Fungorium 17:768. 1905. 



"A proximo gen. Acerbia dift'ert peritheciis setigeris, ab 



Ophiocerate cum peritheciis erostibus tum indumento piloso." 



[Ascomycetae.] 

 BoNANSEjA Saccardo. n. g. Pezizales. Journal of Mycology 



12:50. 1906. 



"Ascomata epidermide tecta dein erumpenti-subsuperficialia, 



disciformia, ceracea (brunnea). disco mox aperto, applanato; 



excipulo brevissimo obsolete proscnchymatico. Asci cylindracei, 



paraphysati, octospori. Sporidia sphaeroidea hyalina,' nucleata, 



dein brunnea." 



[Ascomycetae.] 

 Capnodiella Saccardo, n. g. Sphaeriaceae. Sylloge 



Fungorum 17:621. 1905. As subgenus of Capnodium, "Sacc. 



op. cit. I :74. 1882. Replacing Sorica Gisenh. Berichte d. 



Deut. Bot. Gesell. 22:195. pi. 13. 1904. 



