Myxophycese, Oscillatoriete, Oscillatoria. 177 



Hah. iii salinis m «Sallnas Bay» prope «Gnanica» ins. I'or- 

 torico (Howe). 



54. Oscillatoria microscopica Fleyaricii Bcitr. Algenflura K. Wilh. 420 

 Land (in Ber. der D. B. Ges. 1892, Hft. 8), p. 459. — Triclio- 

 inatibns super algas sparsis ; articnlis 0,2-0,3 [i. crassis (?), snb- 

 quadratis ; filamentis pallide viridibus, serpentinis, in strata ser- 

 pentina associatis; liormogoniis e 20-25 articulis constantibus. 



Hab. in Polysiplionia pulvinata Kuetz. f. parvula Heydr. 

 in « Kaiser-Wilhelms Land » Papuasiie (Schneider). — An forsan 

 Bacteriaceis adscribenda? 



55. Oscillatoria laBtevirens (Crouan) Gom. Monogr. p. 226, t. VH, 421 

 f. 11, Coll. in Coll., Hold. et Setch. Phyc. Bor. Amer. n. 10541 

 Oscillarna hvfecirens Crouan in Bull. de la Soc. bot. de France 

 VII, p. 371, 1860, Fl. du Finist. p. 112, Batters in Berwickshire 

 Nat. Club Trans. 1889, p. 15, Holm. et Batt. Rev. of Brit. mar. 

 Alg. in Ann. of Bot. V, p. 68, non Hofman Bang de Usu Confer- 

 varum p. 23. — Strato tenui membranaceo, pulchre viridi; tricho- 

 matibus luteole viridibus, eximie rectis, fragilibus, ad genicula 

 breviter constrictis, 3-5 ^.. crassis, apice breviter attenuatis, undu- 

 latis et uncinatis, rarius rectis; articulis subquadratis, 2,5-5 [x. 

 longis; contentu uniformiter granuloso aut dissepimentis punctatis; 

 cellula apicali plus minusve obtusa vel subacuta, haud capitata; 

 calyptra nulhi. 



Hab. Catenell;e Opuntiae frequenter immixta in rupibus mari- 

 timis ad litora Caledonite (Batters), Anglia^ (Cutler, Holmes), 

 Gallia; prope Brest (Crouan), in tegumentis Lepadura ad oras 

 Gallia' septentrionulis (Debray), in fundo salinarum apud le Croisic 

 (Gomont), ad oras atlanticas Nova3 Angliie Amer. bor. (Collins) 

 et in ins. Whidbey (Gardner); in insula « Laysan » Polynesia^, 

 (Lemmermann). 



b) Plautce hydrophilfe, frequenter therinales, rarius submarinae. 



5G. Oscillatoria acuminata Gomont Monogr. p. 227, t. VII, f. 12, 422 

 Oscillaria Cortii PoII. scc specimen Zanardinii in herb. Lenormand 

 non Oscillaria Gortiana Menegh. nec Kuetz. — Trichomatibus in 

 stratum lerugineo-viride agglomeratis, rectis, fragilibus, interdum 

 ad genicula leviter constrictis, 3-5 [x. crassis, apice breviter atte- 

 nuatis, acutissime acuminatis haud capitatis, uncinatis vel tortuo- 

 sis; articulis diam. trichomatis longioribus, rarius subquadratis, 



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