G04 Myxoptiyceae, ]S,ivulariace8e, Calothrix. 



thrix pilus), B. et Fl. Rev. T, p. 345, Borzi Morf. et Biol. in V. 

 G. B. I. 18S2, Vol. XIV, pag. 374, Confervoe, Oscillatorice, Ce- 

 ramii, Desmarestellce, Leibleinice, Rivularioe, Lyngbyce, Sclii- 

 zosiphonis , Symphyosiphonis , Mastigotrichis, Mastigonematis, 

 Amphitrichis, Symplocce, Gtceotrichice sp. — Fila simplicia aut 

 varie prolifera, nunquam dichotome divisa. Heterocystie nunc in- 

 tercalares, nunc basilares, in nonnullis speciebus liucusque inco- 

 gnita^. Ctespites tomentosi, pulvinati vel penicillati. Sporse seriat», 

 basilares. 



Sectio I. HoMCEOTHRix Thuret. — Heterocystse nullae vel hucusque incognitye. 



1. Calothrix rubra (Crouan) B. et Flah. Rev. I, p. 345, Schizothrioc vm 

 ruhra Crouan Florule du Finistere, p. 118 (1867). — Strato c;i3- 

 spitoso, minuto, expanso, fusco-rubro; filis 1-3 mm. longis, 3-5 [x. 

 crassis, affixis, utrinque ascendentibus, piliferis, densissime aggre- 

 gatis, simplicibus vel Scytonematum modo pseudoramosis; vagina 

 tenuissima, arcta, hyalina, homogenea, interdum ocreata; trichoma- 

 tibus fusco-rubescentibus; articulis diam. dimidio brevioribus, gra- 

 nulosis; heterocystis nullis. 



Hah. ad rupes schistosas maritimas aqua dulci irroratas, in 

 summo limite fluxus, prope Brest Gallite (Crouan). 



2. Calothrix balearica Born. et Flah. Rev. I, p. 348 et in W. et N. 1384 

 Alg. exs. n. 851! — Strato ctBspitoso, expanso, olivaceo-fusco; 

 fllis basi decumbentibus, intricatis, 1 mm. longis, 12 |x. diam., 

 inferne haud incrassatis, simplicibus vel parce pseudoramosis, ra- 



mis vagina inclusis, adpressis; vagina arcta, passim lamellosa, tran- 

 cata, demum luteo-fusca; trichomatibus 7-9 [j.. crassis, aerugineo- 

 olivaceis; articulis discoideis diam. brevioribus. 



Hab. ad rupes madidas in meridiem spectantes prope Angers 

 Gallia3 (Hy) et prope parietes piscinarum et puteorum insulae Mi- 

 noricae (Rodriguez). — Var. tenuis W. et G. S. West in Journ. of 

 Bot. (1898) Not. on freshw. Alg. H, p. 7, Alga-Flora of Yorkshire 

 pag. 137 [1902]: fllamentis diametro circiter dimidio brevioribus 

 quam in typo, 3,5-5 [x. diam. tantum, tortuosis et intricatis, hete- 

 rocystis carentibus ; vaginis more truncatis, a3tate provecta cha- 

 racteristice brunneis — «Simon's Fell » in ditione «York» Angliae 

 (West). 



3. Calothrix Hansgirgi Schmidle Hansgirg's Ind. Alg. in Allg. Bot. 133^ 

 Zeitschr. 1900, p. 35 et in Hedwigia (1900) p. 174, t. IX, f. 22. -- 



