446 Phycomyceta?, Chytridiacepp, Astreptoiieina. 



ornatis, apice nunquam in collum longum attenuatis, levibus, sine 

 operculo apertis; zoosporis ignotis; vesicula globosa, subsporangiali; 

 sporis? perdurantibus globosis v. ovoideis, membrana crassa gra- 

 nulosa inclusis, in zygosporis algarum evolutis. 

 Hah. in cellulis Spirogyrae, Nancy Gallise. 



RHIZIOIUIW A. Braim — Syll. VII, p. 296, IX. p. 358, XI, p. 248. 

 J. Rhizidiufn Chatophorae De Wild. Ann. Soc. belg. Micr. 1895, p. 216, 1685 

 t. Vn, fig. 15-21. — Zoosporangiis piriformibus, raro ellipticis, 

 basi vesicuUm filamentis mycelicis paucis ramosis suifaltam geren- 

 tibus, membrana levi, demum apice apertis ibique irregulariter 

 laceratis, magnitudine valde variantibus, 20-38 ^* 15-20; zoosporis 

 3 [i. circiter diam. ; sporis perdurantibus ignotis. 



Hab. in tiiamentis Cliaitopliorte elegantis in Gallia. 

 2. Rhizidium? Autrani De Wild. Ann. Soc. belg. Micr. 1895, p. 72, 1636 

 t. II, f. 17-21. — - Sporangiis e cellulis duabus constitutis; cellula 

 inferiori elongato-ovoidea, vulgo sursum inflata, basi in iilamenta 

 radiciformia non producta; cellula superiori globosa, interdum sub- 

 elongata, apice dein apertis. 



Hah. in Cosmariis in Helvetia. 



CHYTRIDIUM A. Braun. — Syll. VII, p. 304, IX, p. 358, XI, p. 250. 



1. Chytridium mlnus Lacost. et Suring. in Rabenb. FI. Eur. Alg. III, 1687 

 p. 277. — Cellula subglobosa v. breviter oblonga, pallide flava, 

 processu papiiliformi mediocri demum aperte coronata, caudicula 

 soiida, e basi lata breviter aucta, demum ssepius in filamentum 

 tenuissimum desinente. 



Hab. in Ulothiricis filis, Conferva rhypophila, GEdo- 

 gonio, Bulbochaste setigera et in Gomphonematis sti- 

 pitibus in HoUandia. — Diam. cellulas altitudini jiequalis v. paulo 

 minor, 10 '/,,-14 p. (exceptis papilla et radicella); speoimina minima 

 5 p., processus 1 '/^-^ '/^ ju. altus, 2 '/,^-4 p. latus. 



2. Chytridium simulans Dang. Le Botaniste, 5 ser. Fasc. I, 1896, 1688 

 p. 21, c, fig. — Filamentis mycelicis cylindricis rectis, simplicibus; 

 sporangiis sphajricis apicalibus v. intercalaribus, per papillam varie 

 sitam dehiscentibus; zoosporis ellipsoideis 1-ciIiatis, 



Hdb. in Pythio quodam parasitans, Poitiers Galiise. 



ASTREPTONEMA Hauptfleisch, Ber. Deutsch. Bot. Ges. 1895, p. 83, 

 t. VIII, fig. 1-10. (Etym. a priv., streptos tortus et nema fiium). 



