Myxopliyceae, Rivulariacese, Calothrix. 6lS 



Setch. Phyc. bor. Amer. n. 859! Howe in C. H. et S. Phyc. bor. 

 Ainer, n. 1167! Lyngbya contexta Harv. Friendly Islands Alijie 

 n. 114, p. 107, tab. 48, D, 1858, Scytonema suhniarinum Crouan 

 in M. et Schr. Alg. de la Guadel. 2"" edit. p. 33, Scytonema Clevei 

 Grunow in Bornet et Thuret Notes Algologiques, p. 14(), 1880. — 

 Strato caespitoso, late expanso, nigro vel obscure aerugineo, piloso; 

 fllis basi intertextis, decumbentibus, utrinque erectis, elongatis, ri- 

 gidis, liberis vel in fasciculos lateraliter concretis, 2-10 mm. altis, 

 sursum sensim incrassatis, 10-40 [i. crassis; vagina dura, crassa, 

 primum aurea, demum luteo-fusca, subopaca, uniformi; trichomatl- 

 bus 10-20 ^. crassis, olivaceo-fuscis, superne breviter attenuatis, 

 cellula hemisphaerica (pili locum tenente) terminatis, heterocystis 

 hinc lllinc interruptis. 



Hab. in mari Mexicano (Harvey); in California (Setchell); 

 in mari Antillarum (Cleve, Grunow); ad oras Guadeloup^B (Du- 

 CHASSAiNG, Maze et Schramm), Portorici (Howe) et in Bostry 

 chia ins. Jamaicse (Collins); ad littora maris Rubri (Frauenfeld); 

 ad « Key-West » Amer. bor. (Farlow) ; in oceano Pacifico a.l 

 insulas Amicoru.u (Harvey); ad littora insuhie Mauritii (De Robil- 

 LARD, Jadin). 



15. Calothrix prolifera Flahault in Born. et Flahault Rev. I, p. 361, 1^97 

 Calothrix crustacea fornia prolifera (Flah.) Coll. in CoII. Hold. 



et Setch. Phyc. Bor. Am. n. 1168! — Strato expanso, velutino, fu- 

 sco-viridi; filis 2 mm. altis, 15-18 [x. crassis, parum flexuosis, basi 

 curvatis, sensim incrassatis, passim pseudoramosis, ramis sub he- 

 terocysta egredientibus; vagina crassa, lamellosa, flrm.a, pluries 

 ocreata ocreis dilatatis laceris, superne achroa, inferne lutea; tri- 

 chomatibus 8-12 ja. crassis, laite cnerugineis, apice in pilum attenua- 

 tis, ai'ticulis brevibus diametro 3-4-pIo brevioribus ; heterocystis 

 basilaribus (1-2) et intercalaribus (pluribusj. 



Hab. ad rupes maritimas maris Mediterranei ad littora Galliae 

 ad Banyuls (Flahaultj; in Oceano prope « Alameda » Californiae 

 (Gardner). 



16. Calothrix fasciculata Agardh Syst. p. 71, 1824, Harv. in Hook. 1398 

 Brit. Fl. H, p. 36S, Man. p. 157, Phyc. britann. t. LVHI, Born. 

 etFIah Rev. I, p. 361, Aokermark in Rab. Alg. exs. n. 1730! Coll. 



in Coll. H. et Setch. Phyc. bor. Amer. n. 2611 Calotlirix scopu- 

 lorum Aresch. Alg. Scand. exsicc. n. 23 et 39 I Schizosiphon fasci- 

 culatus Kiitz. Sp. Alg. p. 330, Tab. phyc. II, p. 17, t. 53, f. I, Rab. 

 FI. Europ. Algar. II, p. 242, Aokermark in Rab. Alg. exs. n. 1869! 



