Myxophyceae j-j 



Trichomes flexuous, coiled; apical cell very long, hooked. 

 Washington. On damp mud at the bottom of a pool nearly dried up. 

 Oak Harbor, Whidbey Island. (Gardner). 



151. Oscillatoria amoena (Kuetzing) Gomont. Monogr. Oscill. 245. pi. 7. f. 



9. 1893. De Toni. Syll. Algar. 5: 175. 1907. 



Collins. Algae. Flora of the Blue Hills, Middlesex Fells, Stony Brook 

 and Beaver Brook Reservations of the Metropolitan Park Commission, 

 Massachusetts. 127. 1896. Saunders. The Algae. Harriman Alaska Ex- 

 pedition. Proc. Wash. Acad. Sci. 3: 397. 1901. 



Plate IV. fig. 26. 



Trichomes 2.5-5 niic. in diameter, scattered or forming a mass, elongate, 

 straight, flexible, slightly constricted at the joints; apex of trichome grad- 

 ually tapering, capitate, hooked or undulate; apical cell furnished with a 

 depressed conical calyptra; cells 2.5-4.2 mic. long (apical cell longer); trans- 

 verse walls marked by two finely granulated lines; cell contents dull blue- 

 green. 



Alaska. Forming a soft, felt-like, dark bluish green mass, 3-10 mm. 

 thick, of indefinite extent, lining the bottom of the outlet of a hot spring. 

 The water in the outlet where the plant was abundant ranged from 80° F., 

 some distance from the spring, to 120° F., near the spring. Near Sitka. 

 (Saunders). Massachusetts. On rocks and trunks of trees. (Collins). 



152. Oscillatoria subuliformis Kuetzing. Diag. und Bemerk. Algenspecies. 



Oster-progress. 7. 1863. Gomont. Monogr. Oscill. 246. 1893. De 

 Toni. Syll. Algar. 5; 176. 1907. 



Farlow. Marine Algae of New England. 33- 1881. Collins. Algae of 

 Middlesex County, Massachusetts. 15. 1888; Marine Algae of Nantucket. 

 4. 1888. Martindale. Marine Algae of the New Jersey coast and adjacent 

 waters of Staten Island. Mem. Torr. Bot. Club, i: 90. 1889. WoUe and 

 Martindale. Algae. Britton's Catalogue of Plants found in New Jersey. Geol. 

 Surv. N. J. 2: 609. 1889. Collins. Algae. Rand and Redfield's Flora of 

 Mount Desert Island, Maine. 248, 1894. 



Plate IV. fig. 27. 



Plant mass dull green; trichomes 47-6.5 mic in diameter, much elon- 

 gated, flexuous, undulating, not constricted at the joints; apex of trichome 

 tapering for some distance, especially flexuous; apical cell obtuse, not capi- 

 tate; calyptra none; cells 4-7-6.5 mic. in length (apical cell up to 10 mic. 

 long); cell contents finely granular, sometimes showing large refringent 

 granules. 



Maine. On rocks near Seal Harbor. (Collins). Massachusetts. Salt 

 marshes. Charles River, Cambridge. (Farlow). Mystic River marshes; on 

 wharves. (Collins). New Jersey. In brackish ditches and pools. Atlantic 

 City. (Morse, Martindale). Staten Island. (Pike). 



153. Oscillatoria salinarum Collins in Collins, Holden and Setchell. Phyc. 



Bor.-Am. Fasc. 24. no. 1160. 1904. De Toni. Syll. Algar. 5: 176. 1907. 



