Myxophyceae 125 



arachnoiidea Crouan). Maze and Schr.amm. Essai Class. Algues 



Guadeloupe. 28. 1870-1877. (L. t h e r m a 1 is Crouan). Tilden. Collection 

 of Algae from the Hawaiian Islands. Haw. Almanac and Annual for 1902. 

 112. 1901; American Algae. Cent. V. no. 490. 1901; Algae Collecting in the 

 Hawaiian Islands. Postelsia: The Year Book of the Minnesota Seaside Sta- 

 tion, i: 166. 1902. West. West Indian Freshwater Algae. Journ. of Bot. 

 42: 291. 1904. Tilden. Notes on a Collection of Al^gae from Guatemala. 

 Proc. Biol. Soc. Wash. 21: 154. 1908; American Algae. Cent. VII. Fasc. i. . 

 no. 637. 1909. j» 



Plate V. fig. 43. 



Plant mass caespitose, blue-green, when dried often becoming violet; 

 filaments long, somewhat flexuous, flexible; sheaths Colorless, becoming 

 thickened and roughened with age; trichomes 6-10 mic. in diameter, not con- 

 stricted at joints; apex of trichome not tapering, not capitate, apical cell 

 rotund; calyptra none; cells 1.7-3.3 mic. in length; transverse walls in- 

 conspicuous or marked by protoplasmic granules; cell contents pale blue- 

 green. 



Central America. On stems of S c i r p u s, dead or dying. Lake Amatit- 



lan, Guatemala. January 1906. (Kellerman). West Indies. Guadeloupe. 



(Maze and Schramm). Near Bridgetown; Graeme Hall Swamp, Barbados. 



(Howard). Hawaii. On twigs under dripping water. Falls four miles 

 from mouth of river. Waialuka River, Hilo. July 1900. (Tilden). 



Var. calcarea Tilden. American Algae. Cent. II. no. 178. 1896; Some new 

 .species of Minnesota Algae which live in a calcareous or silicious matrix. 



Bot. Gaz. 23: loi. pi. 9. f. 4. 1897; List of fresh-water Algae collected in 



Minnesota during 1896 and 1897. Minn. Bot. Studies. 2: 28. 1898. MacMil- 



lan. Minnesota Plant Life. 30. f. 8, 10. 1899. De Toni. Syll. Algar. 5: 280. 



1907. 



Plate V. fig. 44- 



Plant mass forming extended strata throughout upper portions of cal- 

 careous deposit; filaments 6.S-7-5 mic. in diameter, straight, flexible, some- 

 what unequal in size; sheaths very distinct, colorless, smooth or rough; 

 trichomes 5-6.5 mic. in diameter, not constricted at joints, frequently inter- 

 rupted; apex of trichome not or very rarely tapering; cells about 2.5 mic. 

 in length; cell contents dull blue-green, violet or rarely brown. 



Minnesota. Forming a part of the lime encrustation which covers sides 

 of wooden tank. Minneapolis. October 1895. (Tilden). 



237. Lyngbya putealis Montagne. 2e centurie de Plantes cellulaires ex- 



otiques. Ann. Sci. Nat. Bot. II. 13: 200. 1840. Gomont. Monogr. 



Oscill. 163. pi. 3. f. 14- 1893- De Toni. Syll. Algar. 5: 277. 1907. 



Schramm and Maze. Essai Class. Algues Guadeloupe. 31. 1865. (Also 



Leibleinia torta Crouan, Lyngbya arachnoidea Crouan, 



L putealis minor). Maze and Schramm. Essai Class. Algues 



Guadeloupe. 28, 30, 31- 1870-1877. (Also L. rufescens Crouan, L. b i- 



color Crouan, L. torta Crouan, L. fusca Crouan, L. font ana 



