Myxophycese, Scliizotrioheee, Siroooleus. 



Species excludenda. 



Dasygloea amorpha Crouaii Fl. dn Kinist. p. 114, 18!!8 = Phor- 

 midiiim Coriam (.Vg.) Gom. 



Tribufi MiCROCOLK/E. 



g;itis constltuta. 



SIROCOLEUS Kuetz. |1849] Sp. X\<r. p. 2-59 (Etyui. seira catena et 

 coleos vagina), Gomont Monogr. p. 347, Lyngbyci', Chtonohlasti, 

 Hyclrocolei, Microcolei sp. Auct. — Fila elongata, CcBspitosa fru- 

 ticulosa, subdicliotome ramosa; vaginse firma3 vel diffluentes, haud 

 coloratse, cylindracese, non lamellosae, clilorozincico jodurato non 

 caerulescentes; tricliomata intra vaginam numerosa, in fasciculos 

 plures distinctos ssepe aggregata; apex trichoniatis rectus; cellula 

 apicalis conica, haud capitata. 

 Ohs. Plantse maringe. 



1. Slrocoleus guyanensis Kuetz. Sp. Alg. p. 259, Tab. Phyc. I, p. 37, 905 

 t. 51, f. II, Montagne Crypt. Guy, in Ann. des Sc. Nat. III Ser., Bot., 

 XIV, p. 307, Lynghya ceruginosa Mont. in Ann. des Sc. Nat. 11 

 Ser., Bot., XIII, p. 200, Lynghya guyanensis Mont. Crypt. Guy. in 

 Ann.desSc.Nat. III Ser. Bot. XIV, p.306 {non Knetz. ) Hydrocoleum 

 platense Nordst. in W. et N. Alg. exs. n. 994! Descr. syst. disp. 

 p. 59, Microcoleus guyanensis Gom. in Journ. de Bot. IV, p. 353. 

 — Ca3spitibus niollibus.sordide virescentibus aut obscure aerugineis, 

 ad 3 cm. altis; filis subdichotome aut fasciculato-ramosis ; vaginis 

 hyalinis vel sordide luteo-virescentibus, crassis, agglutinantibus, 

 transverse, repetite corrugatis, fere squamosis, lirmis, apice apertis 

 vel clausis et acuminatis; trichomatibus aeruginosis, intra vaginam 

 basi paucis, apice permultis, subrectis, parallelis, ad genicula con- 

 strictis, 4-5,5 jj.. crassis; articulis subquadratis vel diam. tricho- 

 matis usque 3-plo longioribus, 3,5-12 [j.. longis, contentu grosse 

 granuloso farctis; dissepimentis haud granulatis; cellula apicali 

 acute conica. 



Hah. rupibus submersis adfixus ad littora maritima insularura 

 Canariensium (Suhr), Guineie, Senegaliag ad ostium fluvii Gabon 



