64 Minnesota Algae 



Am. Fasc. i6. no. 753. 1900; The Algae of Jamaica. Proc. Am. Acad. Art.s. 

 Sci. 37: 239. 1901. De Toni. 1. c. 152. 



Plant mass bright purple; trichomes bright purple. 



West Indies. Forming a stratum on a roadside brook, near the baths. 

 Jamaica. July 1900. (Pease and Butler). 



129. Oscillatoria proboscidea Gomont. Monogr. Oscill. 229. pi. 6, f. 10, 11. 



1893. De Toni. Syll. Algar. 5: 152. 1907. 

 Crouan in Maze and Schramm. Essai Class. Algues Guadeloupe. 17. 

 1870. (O. antillarum Crouan). Wood. Contr. Hist. Fresh- Water Al- 

 gae North America. 20. pi. 2. f. 5. a, b. 1872. (O. neglecta Wood). 

 Collins. Algae of Jamaica. Proc. Am. Acad. Arts Sci. 37: 289. 1901. Col- 

 lins, Holden and Setchell. Phyc. Bor.-Am. Fasc. 24. no. 1159. 1904. Setch- 

 ell and Gardner. Algae of Northwestern America. Univ. Calif. Pub. Bot. i: 

 182. 1903. 



Plate IV. fig. 4. 



Plant mass dark green; trichomes 12-15 mic in diameter, straight or 

 somewhat flexuous, here and there spiral, not constricted at joints, some- 

 times mixed with other Oscillatorias; apex of trichome briefly tapering, 

 capitate, almost truncate, curved or loosely spiralled; apical cell showing 

 a convex, slightly thickened outer membrane; cells 2-4 mic. in length; 

 transverse walls never granulated; cell contents finely granular. 



Alaska. In a small pond of fresh water. Glacier Valley, Unalaska. 1899. 

 (Lawson). Pennsylvania. In shallow ditches along railroad track. Near 

 Manayunk. (Wood). California. On rocks in stream. North Berkeley. 

 March 1901. (Gardner). West Indies. Guadeloupe. (Maze and Schramm). 

 In a pool by "Wag Water" and in stream from reservoir. Castleton, 

 Jamaica. April 1893. (Humphrey). 



130. Oscillatoria sancta Kuetzing. Tab. Phyc. i: 30. pi. 42. f. 7. 184S-1849. 



Gomont. Monogr. Oscill. 229. pi. 6. f. 12. 1893. De Toni. Syll. 

 Algar. S: 153. 1907. 

 Tilden. Am. Alg. Cent. I. no. 73. 1894. (O. 1 i m o s a). Collins, Hol- 

 den and Setchell. Phyc. Bor.-Am. Fasc. 10. no. 500. 1898. Setchell. Notes 

 on Cyanophyceae. — III. Erythea. 7: 53. 1899. Tilden. Am. Alg. Cent. V. 

 no. 495. 1901; Collection of Algae from the Hawaiian Islands. Haw. Almanac 

 and Annual for 1902. 112. 1901; Algae Collecting in the Hawaiian Islands. 

 Postelsia: The Year Book of the Minnesota Seaside Station, i: 166. 1902. 

 Setchell and Gardner. Algae of Northwestern America. Univ. Calif. Pub. 

 Bot. 1: 182. 1903. 



Plate IV. fig. 5. 



Plant mass dark lead-colored, becoming violet when dried and tinting 

 paper a beautiful violet; trichomes 10-20 mic. in diameter, elongate, flexible, 

 straight or curved, fragile when dried, constricted at joints; apex of trich- 

 ome very briefly tapering, somewhat capitate, straight; cells 2.5-6 mic. in 

 length; wall of apical cell strongly thickened into a conspicuous convex 

 calyptra; transverse walls marked with densely crowded coarse granules; 

 cell contents olive green or mouse-colored, 



