REVISION DES NOSTOCACÉES HÉTÉROGYSTÉES. 



37i 



eastern Norlh-America, p. 127, 1869; Contribution to the History of Ihe fresh-water 

 Algœ of Nortk-America {Smiilisonian Contributions io Knowledge, 1872), p. 45 

 tab. 3, fig. IV (synon. dubium). 



Fronde globosa usque ad 10 centim. lata, bullata, cava, 

 sordide olivaceo-viridi, molli ; filis laxe consociatis, pressione 

 facile secedentibus ; trichomatibus 7-9 ]j. crassis, olivaceis, in 

 pilum crassum attenuatis; articulis inferioribiis doliiformibus 

 seque longis ac crassis, superioribus diametro brevioribus; 

 sporis 40-250 p. longis, sine vagina 10-18 p. crassis; tegu- 

 mento exteriori ssepe amplo, usque ad 40[ji.dilatato. transverse 

 undulato plicato, hyalino vel fuscescente, superficie Isevi. 

 Videtur biennis. (v. v.) 



Hab. ad plantas submersas vel natans in fossis et slagnis 

 torfaceis Sueciae (Agardh !), Daniae (Lyngbye!), Neerlandiœ 

 (Suringar!), Belgise!, Gallise ! septentrionalis et occidentalis, 

 Germaniae (Mertens, Al. Braun, Itzigsohn !), Austriae et Hun- 

 garise (Grunow!), Istriae (Hauck !) et Araericse fœderatse 

 (Wolle!). 



SPECÎES INQUIRENDA 



Glœotrichia Kurziana Zeller in Kurz, Algœ- collected in Arracan (Journal of Asiatic 

 Society ofnengal,i>. m, W3). 



SPECIES EXCLUDENDA 



Glœotrichia parasitica Rabenhorst, Flora europ. Algar., Il, p. 205, 1865 — Ca- 

 lothrix parasitica Thiiret. 



2. Brachytrichieœ 

 X. — Brachytrichia Zanardini 



Phycearum indicnrum Pugilbis, p. 24, 1872. 

 Nostoc, Rivularia, Phijsactis, Hormactis spec. 



Frons initio solida, démuni cava, ' filis nostochineis, in 

 gelatina nidulantibus farcta. Fila flexuoso-curvata, parallela, 

 sursum attenuata et in apicem piliformem desinentia, rarao- 



