542 Myxophyceae, Scytonemacese, Tolypothrix. 



sim ad basiin ramorum inflatis, hyalinis, rarius luteo-fuscis; tri- 

 chomatibus 9-12 [x. crassis, interdum torulosis, serugineis; articulis 

 diametro sequalibus vel dimidio brevioribus ; heterocystis solitariis, 

 rarius binis vel ternis. 



Hab. ad plantas et lapides affixa vel natans in stagnis et pa- 

 ludibus, nec non in rivulis tranquillis SueeicB (Nordstedt), Fennise 

 (Elfving, Levandee), Anglise (Cooke, "Westj, Scotite (West), Da- 

 iiiae (Hofman-Bang, Lyngbye), Galliee (Bornet, Mougeot, Fla- 

 hault), Helvetia? (Theobald, Wartmann, De Wildeman), Ger- 

 manic^ (A. Braun, Lemmermann, Royers, Kirchner), Austriae (Gru- 

 Now, Hansgirg), Galici^e (Gutwinski), BohemiBe, Dahnati^e (Hans- 

 GiRG), Bosniae (Protic), Hungariiie (Filarszky), Amer. bor. (Bailey, 

 WooD, Tilden, Gardner, Thwaites), dit. Alaslvante (Saunders); 

 in ins. Azoricis (Bohlin); ad «Sarawak» insulae Bornei (Beccari); 

 in ins. Maluinis (Hariot). — Forma magna Wolle Freshw. Alg. of 

 U. S. loc. cit. f. 4 : trichomatibus ad 33 {i. diam. — In Amer. bor. 

 (Wolle). — Var. symplocoides Hansg. Prodr. H, p. 39: strato 

 obscuro usque chalybeo-viridi nigrescente; filamentis in flocculos 

 erectos fasciculatos (ad instar Symplocoe speciei) 2-4 mm. altos, 

 consociatis ; ceteris ut in forma typica. — In tepidario horti bota- 

 nici ad «Smichow» Bohemiae (Hansgirg). 



2. Tolypothrix Raveneiii Wolle in Bull. of Torr. Bot. CI. 1879, p. 285, 

 Freshw. Alg. of U. S. p. 265, t. CLXXX f. 8-10. — Strato minus 

 expanso, aureo-fusco; trichomatibus 15-25 (x. diam., pseudoramulis 

 elongatis, iuternis flavo-rubescentibus^ stepe interruptis distincte 

 articulatis, articulis gracillime granulosis, diam. sukequalibus vel 

 2-plo brevioribus; vaginis subarctis, luteo-fuscescentibus; hetero- 

 cystis basilaribus et interjectis plerumque singulis, obIongis,luteoIis. 



Hab. in arenaria prope « Gainesville, Flor. » Amer. bor. (Ravenel). 



3. Tolypothrix lanata (Desv.) Wartmann in Rabenhorst Algen n. 768! 

 1858, FI. eur. Alg. II, p. 277, Kirchn. Alg. v. Schl. p. 228, incl. 

 var. ffaccida Born. et Flah. Rev. III, p. 120, Hansg. Prodr. II, 

 p. 37 c. ic. var. incl. (non Kuetzing), Tolypothrix tenuis (Kuetz.) J. 

 Schin. Cyan. Dan. pag. 103 (383) p. p., CoII. et Hold. in C. H. et 

 S. Phyc. n. Amer. n. 209, Setch. et Laws. in C. H. et S. Phyc. 

 B. Amer. n. 950 ! Trichophorus lanatus Desvaux Jour. de Bot. 

 II, p. 309 (1809), Conferva distorta Jiirg. Alg. aq. Dec. XI, n. 5, 

 1822, non Fl. dan., Calothrix distorta (5 ffaccida Ag. Syst. AI- 

 gar. p. 72, 1824, Oscillaria cvgagropila Cda. in Alm. de Carlsb. 

 (1836;, p. 214, 



