Myxopbyceae, Osoillatoriese, Artlirospira. 207 



p. 90, Cooke Brit. Froohw. Alg. p. 2i5, t. XCVI, f. 1, Arthrospira 

 Bdryana Stiz. 1. c. p. 33, t. 5, f. 3-4. — Tricliomatibiis plus iiii- 

 nusve saturate lerugineis, stratuni tenue rormantibus aut sparsis, 

 fragilibus, in spiram laxam diam. 9-15 [x. jequantem contortis, ad 

 genicula haud raro subconstrictis, apice lequalibus, haud capitatis, 

 5-8 ]x. crassis, articulis subquadratis aut diametro brevioribus, 

 4-5 [X. longis contentu vix granuloso farctis; dissepimentis interdum 

 subtiliter granulatis. 



Hah. in aqua dulci per Sueciam et Norvegiam (Nordstedt), 

 Bataviam (Suringar), l^ritanniam (Hassall, Cooke, West), Bosniam 

 (Protic), Galliam ad Monspessulanum (Flahault), Helvetiam 

 (Wartmann), Franconiam (Reinschj, in lacu Constantia^ (Kirchner), 

 Germaniam (De Bary, Karl, Braun, Reuter, Kirchner, Schroeder, 

 RoYERS, 0. Zacharias, Lemmermann), Austriam (Morl, Loitlesber- 

 ger), Bohemiam (Hansgirg), prope Jaderam Dahnatite (Frauenfeld 

 in herb. GrunowI), Galiciam (Gutwinski), Romaniam (Istvanffi), 

 Rossiam (Iwanow, Riabinine), Poloniam (Alexenko), Italiam (De 

 ToNi, FoRTi); « Connecticut » (Setchell) et passim in iVmer. bor. 

 (WoLLE, Holden, Bessey, Tilden) ; «Sarawak» ins. Borneo (Bec- 

 CARi). — forma vaginata (Rabenh. 1. c.) (?) : filis subdistincte vagi- 

 natis. — forma subrecta (Rab. 1. c.) (?) : forma anfractibus valde 

 extensis. Cum typo. — Var. gracilis Hansg. Prodr. II, p. 131, tri- 

 chomatibus circa 5-6 \i.. diam. In Bohemia (Hansgirg). 



4. Arthrosplra platensls (Nordst.) Gom. Monogr. p. 247, Spirulina ^^^ 

 Jenneri [5 platcnsis Nordst. in W. et N. exs. fasc. XIV, n. 679! 

 Descr. Syst. disp. p. 59, Hansg. Prodr. II, p. 121. — Trichoma- 

 tibus a^rugineis, stratum tenue, saturate lerugineum formantibus, 

 fragilibus, in spiram laxam et amplissimam diam. 26-36 [i. lequan- 

 tem contortis, ad genicula subconstrictis, apice leviter attenuatis, 

 haud capitatis, 6-8 {x. crassis; anfractibus 43-57 [x. inter se distan- 

 tibus; articulis subquadratis vel diam. brevioribus, 2-6 [jl. longis, 

 contentu grosse granuloso, dissepimenta saepe obducente farctis. 



Hab. m ditione « Uruguay » Amer. mer. ad « Montevideo » 

 ( Arechavaleta) et in Bohemia passim (Hansgirg). 



5. Arthrosplra miniata (Hauck) Gom. Mon. p 248, Spirulina miniata 547 

 Hauck Beitriige z. Kenn. der Adr. Alg. in QEst. Bot. Zeitschr. 



p. 80, t. I, f. 16-17, 1878, Meeresalg. p. 512, Arthrospira laxis- 

 sima Gom. Essai, in Morot Journ. de Bot. IV, p. 357, 1890. — 

 Strato tenuissimo, mucoso, fusco-rubescenti, vehimine continuo 



