Myxophyceae j 17 



Setchell. Notes on some Cyanophyceae of New England. Bull. Torr. 

 Bot. Club. 22: 429. 1895. Collins, Holden and Setchell. Phyc. Bor.-Am. 

 Fasc. 2. no. 54. 1895. Collins. The Algae of Jamaica. Proc. Am. Acad. 

 Arts Sci. 37: 240. 1901. Setchell and Gardner. Algae of Northwestern 

 America. Univ. Calif. Pub. Bot. i: 187. 1903. West. West Indian Fresh- 

 water Algae. Journ. of Bot. 42: 291. 1904. 



Plate V. fig. 35. 



Plant mass at first adherent, afterwards free, lubricous, somewhat soft, 

 rust-colored on the outside, olive green within; filaments long, twisted, 

 closely entangled; sheaths up to 2 mic. in thickness, colorless, sometimes 

 yellowish, slightly mucous and agglutinated; trichomes 2.8-3.2 mic. in diame- 

 ter, not constricted at joints; apex of trichome neither tapering nor capi- 

 tate; apical cell rotund; calyptra none; cells 2-6.4 mic. in length; transverse 

 walls pellucid, sometimes granulated. 



Alaska. Floating on a deep pool of fresh water. Glacier Valley, Unalaska. 

 (Lawson). Massachusetts. Newton. (Collins). Connecticut. At first 



attached to stones, later rising in a verdigris-green mass. Shores of Lake 

 Whitney, New Haven. October 1892. (Setchell). West Indies. On sides 

 of basin of a fountain. Marine Garden, Kingston, Jamaica. April 1893. (Hum- 

 phrey). Bay Estate, Barbados. (Howard). 



229. Ljmgbya gracilis (Meneghini) Rabenhorst. Fl. Eur. Algar. 2: 145. 1865. 



Gomont. Monogr. Oscill. 144. pi. 2. f. 20. 1893. De Toni. Syll. Algar. 

 5: 259. 1907. 

 Murray. Catalogue of the Marine Algae of the West Indian Region. 

 Journ. of Bot. 27: 261. 1889. Collins. Notes on New England Marine 



Algae. — VII. Bull. Torr. Bot. Club. 23: 458. 1896; Preliminary Lists of New 

 England Plants. — V. Marine Algae. Rhodora. 2: 42. igoo. Collins, Holden 

 and Setchell. Phyc. Bor.-Am. Fasc. 18. no. 853. 1901. 



Plate V. fig. 36. 



Plant mass caespitose, extensive, dense, floccose, lubricous, purplish 

 violet, when dried often becoming colorless or dull yellow; filaments long, 

 flexible, angular; sheaths close, smooth; trichomes 5-8 mic. in diameter, 

 constricted at joints; apex of trichome not tapering; apical cell rotund, 

 showing a slightly thickened outer membrane; cells 2.8-4.6 mic. in length; 

 cell contents finely granular, rose-colored. 



Maine. Among other algae on a mooring buoy that had been hauled 

 up on the beach. Cape Rosier. July 1896. (Collins). California. On 

 Chaetomorpha aereaina pool. Pacific Beach. August 1901. (Snyder). 

 West Indies. Guadeloupe. (Maze). 



230. Lyngbya meneghiniana (Kuetzing) Gomont. Essai Class. Nostocacees 



homocystees. Morot. Journ. de Bot. 4: 354. 1890; Monogr. Oscill. 



145. 1893. De Toni. Syll. Algar. 5: 260. 1907. 



Lemmermann. Algenfl. Sandwich.-Inseln. Bot. Jahrb. 34: 620. 1905. 



Plant mass up to i cm. in height, caespitose, fasciculate, mucous, dull 



blue-green; filaments long, somewhat straight, very flexible; sheaths thin, 



smooth; trichomes 6.5-8 mic. in diameter, constricted at joints; apex of 



