Myxopliycea', Lyiigbyoie, Pliormidium. 241 



in W. et N. Alg. exs. n. 1172! Coll. m C, H. et S. Phyc. Bor. Arn. 

 n. 254 ! Amphithrix amuiua Kuetz Phyc. gen. p. 220, Sp. Alg. 

 p. 274, Tab. Phyc. I, p. 45, t. 79, f. I, Phormidium lynghyacemn 

 Fres. in Rab. exs. n. 75, Rab. Fl. Eur. Alg. 11, p. 124, non Kuetz., 

 Phormidium papyrinum de Bary in Rab. exs. n. 265! non Kuetz., 

 Phorm. papyraceum Rab. Fl. Eur. Alg. II, p. 125, Chtonoblastus 

 incrustans Hilse in Rab. exs. n. 1956 p. p., Lynghya Juliana 

 P Paludi7uu Wittr. in W. et N. exs. fasc. X, n. 492, Dcscript. 

 p. 59, Lyngbya Paludino3 Hansg. Prodr. II. p. 101. — Strato 

 plus ininusve expanso, atro vel luteo-viridi aut a^rugineo; filis 

 elongatis, tlexuoso-curvatis, varie intricatis; vaginis firniis aut mu- 

 cosis et diiHuentibus, interduni crassis et lamellosis, chlorozinc. 

 jodur. cu3rulescentibus; trichomatibus aerugineis, ad genicula leviter 

 constrictis, 4-6 \u crassis, apice rectis neque attenuatis neque ca- 

 pitatis; articulis diam. trichomatis ad 4-plo brevioribus, 1,5-2,7 {x. 

 longis, granulis refringentioribus dissepimenta noununquam obdu- 

 centibus fartis, dissepimentis raro granulatis; cellula apicali rotun- 

 data, membranam superne leviter incrassatam pra^benti. 



Hah aquas dulces, subsalsas et thermales in Suecia ad Hol- 

 miam et prope «Borgholm» (Wittrock, Noedstedt, Lagerheim), 

 Gallia ad Troyes (Hariot), Germania (Kuetzing, De Bary, Braun, 

 Fresenius, Hilse, Lemmermann, Royers), Austria (Schiedermayr, 

 Hansgirg), Hungaria in lacu « Balaton » (Istvanffi), Italia ad 

 Mutinam (M.\cchiati), Istria (Schmidle), ins. «Ceylon» (Ferguson), 

 Siam (Volz), ditione Massachussetts (Collins), National Park Amer. 

 bor. (Tilden); ad ins. Orcades (Gardner). 

 53. Phormidium Retzii (Ag.) Gom. in Journ. de Bot. IV, p. 355, 625 

 Moiiogr. p. 175, Johs. Schmidt. Cyan. Dan. p. 66, Setch. et Hold. 

 in Coll., Hold. et Setch. Phyc. bor. Amer. n. 3 ! non Kuetz., 

 Oscillatoria Retzii Ag. Disp. Alg. Suec. p. 36, 1812, Syst. p. 65, 

 Lyngbya Retzii Hansg. Prodr. 11, p. 100, Wolle Freshw. Alg. of 

 U. S. p. 302, Oscillatoria lcuvigata Vauch. in Herb. Mus. Paris. 

 (fide Hansg.), Oscillatoria scorigena Libert Crypt. Arduenn. n. 399 

 (fide Gom.), Oscillaria papyrina Bory Dict. class. d'Hist. Nat. 

 XII, p. 476 (1827), Lynghya membranacea (Kuetz.) Thur. var. 

 papyrina Hansg. Prodr. II, p. 98 p. p., Lyngbya papyrina Kirchn. 

 Alg. V. Schles. p. 241 p. p., Wolle Freshw. Alg. of U. S. p. 302, 

 t. CII, f. 9-11 (mahej p. p., Ph. papyrinum Kuetz. Phyc. gen. 

 p. 195, Phyc. germ. p. 164, Sp. Alg. p. 257, Tab. Phyc. I, p. 34, 

 t. 48, f. III, Ph. Boryanum y Kuetz. Sp. p. 251 p. p., Ph. 



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