Myxophycese, Rivulariaceae, Calothrix. 607 



var. zostericola Crouan Alg. Mar. da Finist. n. 341 1 Leibleinia 

 faccida Lenormand in Mandon , AlgaB maderenses n. 41 ! an 

 Kiitzing in Bot. Zeitung 1847, p. 193, non Crouan. — Filis gre- 

 gariis stellatim fasciculatis, in algis majoribus affixis, nigro-viridi- 

 bus vel chalybeis, exsiccatione in colorem violaceum vergentibus, 

 rigidis, 2-3 mm. altis, 12-25 \x. crassls, basi subsequalibus, va- 

 gina arcta, saepissime tota achroa, rarius infra medium luteo-fusca, 

 homogenea, molli, superne gelatinosa; trichomatibus 10-18 {i.. cras- 

 sis, articulis diam. 4-5-plo brevioribus; heterocystis 1-2 basilari- 

 bus; hormogoniis in vagina numerosis, 4-6-pIo longioribus quam 

 latioribus. 



Hah. in mari Albo (Gobi) et in oceano Arctico (Reinke), in 

 oceano .\tIantico ad oras Norvegise (Foslie, Boye, Gran), « Slap » 

 Suecia3 (Areschougj, Danife (Lyngbye, (Jj]rstedt, Hofman-Bang, 

 RosENviNGE, C. Rosenberg), siuus Chiliensis (Reinke, Reinbold), 

 Hispaniie (Lazaro), Scotia^ (Batters, Traill), Gallia^ septentriona- 

 lis (Debray) et occidentalis ad « Le Croisic » (Flahault), usque 

 ad insulam Maderam (Mandon) et ins. Canarienses (Piccone, Gru- 

 Now) ad litora America3 borealis (Harvey, Anderson, Farlow, Col- 

 lins, Hooper, Pike, Morse, Setchell, Martindale), Jamaica3 (Col- 

 LiNs); ad Balaclawa in mari Nigro (Deckenbach); in mari Adriatico 

 (Hauck); ad oras tingitanas (Schousboe); in mari Rubro (Zanab- 

 dini) ; in Oceano Australi (Harvey) ; ad oras Australia3 occidentalis, 

 ins. « Dirk Hartog » (Askenasy); ad Laysan (Schauinsland) et 

 ins. Mauritii (Robillard, Jadin). — Var. a. purpurea B. et P'I. 

 Rev. I, p. 350: trichomatibus purpureis. — In mari Adriatico ad 

 oras Illyricas et Dalmaticas (Grunow, Meneghini). — Var. (3 me- 

 diterranea FI. in B. et FI. Rev. p. 351 : filis densius csespitosis, 

 minus rigidis, exsiccatione flaccidis et penicillatim adglutinatis, 

 12-17 [J.. crassis. — Ad algas in mari Mediterraneo (Flahault), ad 

 Neapolin (Falkenberg). 

 6. Calothrix consociata (Kuetz.j Born. et Flah. Rev. I, p. 351, Schi- 1388 

 zosiphon consociatus Kuetz. Phyc. gen. p. 234, Sp. Alg. p. 331, 

 Tab. phyc. II, p. 17, t. 54, f. III, Grun. Reise der Novara, Algen, 

 p. 32 (1867). — Filis gregariis et stellatim fasciculatis, algis fili- 

 formibus affixis, nigro-viridibus, rigidis, y^ mm. altis, 21-29 {x. cras- 

 sis, basi curvatis, decumbentibus, parum incrassatis; vagina arcta, 

 fusca, membranacea, pluries ocreata, apice in infundibulum dila- 

 tata, lamellosa, lamellis exterioribus hyalinis; trichomatibus 12 [x. 



