624 Myxophycege, Rivulariacese, Calothrix. 



tis thermalis ad « Hveravellir» Islandife (G. S. West). Differt 

 a typo crassitudine filorum et vagina evidentius stratosa. — Var. 

 hibernica W. et G. S. West A Contrib. to Fresliw. Alg. of N. of 

 Irel. in tiie Trans. of the Roy. Irish Acad. Vol. XXXII B (1902) 

 p. 71: filamentis valde brevioribus, fere rectis, gradatim attenuatis 

 8-13 ^ 5-7,5 [J.., vaginis non ocreatis. — In rupibus ad oras sta- 

 gni « Longh Beg» prope « Londonderry » Irelandise (West). — Obs. 

 A C. parietina (Naeg.) Thur. vix differre videtur Mastigonema 

 lutea (sicl) Wolle in Bull. Torr. Bot. Club 1877, p. 139, sequenti 

 modo descripta : strato tenue, ochraceo ; filis aggregatis, suberectis 

 vel flexuoso-incurvis, simplicibus; trichomatibus Isete brunneo-au- 

 rantiacis, articulis diam. fere dimidio brevioribus, vagina ampla 

 (an diffluente?) concolori vel achroa, firma, plerumque apice aperta 

 et trichoma longitudine excedente; heterocystis oblongo-globosis. 

 — Ad lapides partim inundatos in Amer. bor. (Wolle). 



33. Calothrix Kawraiskyi Schmidle Algen aus den Hochseen des 

 Kaucasus 1897, pag. 9. — Strato dense hirsuto, epiphytico, '/j-Yg 

 min. alto; filaraentis non ramosis, basi circ. 4 [x. diam., apicem 

 versus gradatim attenuatis, in pilum longissimum, subtilissimum 

 extremitate productis, basi valde et immediate incrassatis, hetero- 

 cysta hemisphaerica vel semiellipsoidali hyalina terminatis, plerum- 

 que rectis, rarius apice vel etiam basi curvatis ; vagina arcte ad- 

 ha:!renti, hyalina, subtifi, hoinogenea nec plicata; celluHs rectangu- 

 laribus, diametro paulo longioribus vel subquadratis vel fere 2-plo 

 brevioribus; vaginis iegre conspicuis; contentu aerugineo-viridi, le- 

 viter granulato. 



Hab. in lacu « Tschaldir-goll » Caucasi (Sghmidle). 



34. Calothrix Braunii Born. et Flah. Rev. I, p. 368, J. Schm. Cyan. 

 Dan. pag. 114, Hold. in C. H. et Setch. Phyc. bor. Amer. n. 112, 

 Nordst. in W. et Nordst. Alg. exs. n. 8561 Simmons in W. N. et 

 Lag. Alg. exs. n. 1606! Mastichonema ccespitosum Al. Br. in 

 Born. et Fl. loc. clt., non Kiitzing, Isactis ccespitosa f. tenuior 

 viridis Wolle Freshw. Alg. of U. S. pag. 245, t. 178, f. 1-3 et 

 t. 205, f. 6-7 (sententia Setcheliil). — Strato csespitoso, velutino, 

 serugineo; filis dense stipatis, paralleUs, rectis, '/,, mm. longis, 

 9-10 ]s.. crassis, basi curvatis, incrassatis; vagina tenui, arcta, 

 achroa, uniformi; tricliomatibus 6-7 [i. crassis, aequalibus, in pihim 

 longissimum attenuatis, saepe torulosis, articulis diam. paulo bre- 

 vioribus; heterocysta basilari. 



JIc(,b. ad ligna submersa in Germania ad Donaueschingen dit. 



