Scytonema nigrescens Kiitzing, Species Algar., p. 303, 1819; Tabula phijcolog., Il, 

 p. 5, tab. 16, fig. il. 



— olivaceum Zeller in Kur/,, Algœ collected in Arracan (Journal of 



Asialic Societij of Bengal, XLII, pars II, p. J«3, 1873); 

 Ilediuigia, XII, p. 173. 



— Parlatorii Fioriiii-Mazzanti, in Flora, XXII, p. 365, 18(i i. 



— parvulum Zelicr in Kurz, Algœ collecled in Arracan {Journal of Asialic 



Socic'tii of Bengal, XLH, pars II, p. 183, 1873); Hedtvigia, 

 XII, p. 173. 



— polymorphum Nœgeli sec. Rabenliorst, Flora europ. Algar., II, p. 257, 



1865. 



— pulvinatum RahonhoT&l, Dcutschlands Kryplogamenjlora, p. 86, 1847. 



— Rhizophorae Zeller in Kurz, Algœ collected in Arracan (Journal of Asialic 



Socielij of Bengal, XLU, pars II, p. 183, 1873); Iledwigia, 

 XII, p. 173. 



— rubicundum Itzlgsohn, Phijkologische Studien, iii Nova Acla Acadein. 



Leopoldo-Carolin., XXVi, pars I, p. 155, tab. 10, 1855. 



— rubrum Muiitagne, Première Centurie de plantes cellulaires exotiques 



(Ann. des se. nat., 2" sér., Bol., VIII, p. 349, 1837). 



— simplex Wood, Contribution to the Ilistonj of llte fresli-water Algœ of 



Norlli-Anierica, in Smitlisonian Contributions to lùiowledge, 

 p. 57, 1872. 



~ Soverbyanum Agardh, Sijstema Algar., p. 41, 1824. 



— subclavatum Zeller in Kurz, Algœ collected in Arracan (Journal of 



Asialic Societg of Bengal, XLII, pars II, p. 183, 1873); 

 Jledwigia, XII, p. 173. 



— thermale [s. decumbens Kiitzing, Phijcologia generalis, p. 215, 1843; 



Spec. Algar., p. 304. 



— thermale b. chloroides Kabenhorsl, Flora europ. Algar., II, p. 250, 



1865. 



— thermale d. rhaeticum Briigger, in Iledwigia, II, p. 182, 1863. 



— truncicola Rabenliorst b. saxicola Grunow, in RAheahorst, Flora europ. 



Algar., II, p. 257, 1865. 

 turicense [i. rigidum Ktitzing, Species Algar., p. 306, 1849. 



— ? velleum Agardli, Sijslema Algar., p. 38, 1824. 



— velutinum Kiitzing var. Meneghinianum Heutler, Enumeratio cryptoga- 



mariim llaliœ venelœ (Acla cesareo-regiœ Societ. zoolog. 

 hotan., XXI, p. 92, 1871). 

 Vieillardi Martens in Kurz, Algœ collected in Arracan (Journal of . Asialic 

 Socielij of Bengal, XLII, pars II, p. 182, 1873); Iledwigia, 

 XII, p. 173. 



— violascens Zeller in Kurz, Algœ collected in Arracan (Journal of Asialic 



Socielg of Bengal, XLII, pars II, p. 183, 1873); Hedwigia, 

 Xll, p. 173. 



SPECIES EXCLUDEND^ 



Scylonenia wrugiiieunt Lespinasse , /l/f/ifes du Sud-Ouest (Actes de la Soc. linnéenne 

 de Bordeaux, 1883) = Tolypothrix lanata Wartmann. 



— arenarium Berkeley, in Annals of Natural Ilistory, III. p. 327, 1839 = 



Algœ varias permixlœ. 



— atrovirens Agardh, Disposilio Algar. Sueciœ, p. 39, 1812 = Ephebe 



■pubescens Fr. 



— atrovirens p. ocellata Agardii, Dispositio Agar. Sueciœ, p. 39, 1812 = 



Stigonema ocellatum Tliuret. 

 Bangii Lyngbye, Hgdrophylologia danica, p. 98, tab. 28, fig. c, 1819 = 

 Microcoleus Friesii Tliuret. 



