128 Minnesota Algae 



244. Lyngbya hyalina Harvey. Nereis Boreali-Americana. Part III. 104. pi. 



47 G. 1858. De Toni. Syll. Algar. 5: 293. 1907. 



Farlow. List Marine Algae U. S. Proc. Am. Acad. Arts Sci. 10: 380. 

 1875. Bennett. Plants of Rhode Island. 115. 1888. (Microcoleus 

 hyalinus (Kg.) Kirchn.). Murray. Catalogue of the Marine Algae of 

 the West Indian Region. Journ. of Bot. 27: 261. 1889. 



Plant mass forming indefinite, very soft and somewhat gelatinous con- 

 tinuous tufts or pilose strata; filaments attached by their bases, erect, 

 straight, very slender, arachnoid, gelatinous-membranaceous, flaccid; trans- 

 verse walls visible in older plants; cell contents granular, very pale yel- 

 lowish green or nearly colorless. 



Rhode Island. Davisville. (Bennett). Florida. On lime encrusted 



rocks. Key West. (Harvey). 



245. Lyngbya pusilla Harvey. Nereis Boreali-Americana. Part III. 103. 



pi. 47 E. 1858. De Toni. Syll. Algar. 5: 293. 1907. 



Farlow. List Marine Algae U. S. Proc. Am. Acad. Arts Sci. 10: 380. 1875. 



Plant mass minute, blackish green; filaments very slender, short, 

 crisped, spreading in small bundles; sheaths very thin, colorless; transverse 

 walls distinct; cell contents pale dull green. 



South Carolina. Parasitic on small algae. Sullivan's Island. (Harvey). 



246. Lyngbya rubra Crouan in Maze and Schramm. Essai Class. Algues 



Guadeloupe. 29. 1870-1877. De Toni. Syll. Algar. 5: 293. 1907. 



"Filamentis tenuissimis, in stratus maculiformes vel fasciculatos ad cm. 

 longos consociatis, apice obtusis; articulis subquadratis, contentu subrubro 

 repletis." 



West Indies. Guadeloupe. (Maze and Schramm). 



247. Lyngbya rubro-violacea Crouan in Maze and Schramm. Essai Class. 



Algues Guadeloupe. 29. 1870-1877. De Toni. Syll. Algar. 5: 293. 

 1907. 

 "Filamentis in fasciculos penicillatos, plus minusve in spiram con- 

 volutos, 1-2 cm. longos conjunctis; articulis subquadratis, contentu violaceo- 

 obscuro, aetate provecta rubro." 



West Indies. On madrepores. Guadeloupe. (Maze and Schramm). 



Genus SYMPLOCA Kuetzing. Phyc. Gen. 201. 1843. 



Filaments branched, ascending from a prostrate base, agglutinated to- 

 gether in erect or anastomosing fascicles, or wick-like bundles, more or less 

 procumbent, coalescing; false branches solitary; sheaths thin, colorless, firm 

 or somewhat mucous; apex of trichome straight, sometimes a little taper- 

 ing; outer membrane of apical cell slightly thickened in some species. 



I. Plants living in salt water. 

 I. Fascicles erect 

 (i) Plant mass blackish green; trichomes 4-2 mic. in diameter, con- 

 stricted at joints throughout entire length S. atlantica 



