ii6 Minnesota Algae 



inconspicuous; trichomes 3.2-3.5 mic. in diameter, somewhat rigid, entangled 

 and twisted into loose fascicles with penicillate apices; transverse walls 

 marked by granules. 



West Indies. On bed of stream in crater of Grande Soufriere, Dominica. 

 (Elliott). 



226. Lyngbya aerugineo-caerulea (Kuetzing) Gomont. Monogr. Oscill. 166. 



pi. 4. f. 1-3. 1893. De Toni. Syll. Algar. 5: 281. 1907. 

 Jelliffe. A Preliminary List of the Plants found in the Ridgewood 

 Water Supply of the City of Brooklyn, King's County, N. Y. Bull. Torr. 

 Hot. Club. 20: 243. 1893. Setchell. Notes on Cyanophyceae. — I. Erythea. 

 4: 89. 1896. West and West. A Further Contribution to the Freshwater 

 Algae of the West Indies. Journ. Linn. Soc. Bot. 34: 289. 1898-1900. 

 Saunders. The Algae. Harriman Alaska Expedition. Proc. Wash. Acad. 

 Sci. 3: 398^ 1901. Collins, Holden and Setchell. Phyc. Bor.-Am. Fasc. 22. 

 no. 1058. 1903. Setchell and Gardner. Algae of Northwestern America. 

 Univ. Calif. Pub. Bot. i: 187. 1903. Snow. The Plankton Algae of Lake 

 Erie. U. S. Fish Comm. Bull, for 1902. 22: 392. 1903. Collins, Holden and 

 Setchell. Phyc. Bor.-Am. Fasc. 28. no. 1355. 1907. 



Plate V. fig. 32, 33. 



Plant mass dull blue-green; filaments flexuous, fragile; sheaths colorless, 

 firm, thin; trichomes 4-6 mic. in diameter, not constricted at joints, the 

 portion protruding from the sheath very straight; apex of trichome occasion- 

 ally capitate; apical cell depressed conical or rotund, showing a slightly 

 thickened outer membrane; cells 2.3-3 mic. in length; transverse walls 

 sometimes granulated; cell contents frequently coarsely granular. 



Alaska. In a felt-like mass of filaments of V a uc h e r i a. Juneau; in 

 a small pond on an island in the Muir Glacier. (Saunders). Massachu- 

 setts. Forming a blackish encrustation near the water line, in a stone 

 drinking trough. Woburn. September 1905. (Collins). In swamp. Medford. 

 August 1906. (Lambert). Connecticut. Mt. Tom, Salisbury. (Setchell). 

 New York. Ridgewood Water supply, Brooklyn. (Jelliffe). Ohio. Put-in- 

 Bay, Lake Erie. (Snow). Calif ornicu In an aquarium. Golden Gate Park, 

 San Francisco. June 1902. (Osterhout and Gardner). West Indies. On 

 leaves in warm stream, road to Roseau Lake (2500 feet) ; on ground (2000- 

 300 feet) and in stream, crater of Grande Soufriere, Dominica. (Elliott). 



227. Lyngbya cladophorae n. sp. 



Plate V. fig. 34. 



Plants epiphytic; filaments straight or sharply curved and twisted; 

 .cheaths delicate; trichomes S-6 mic. in diameter, not constricted at joints; 

 apical cell rotund; transverse walls indistinct; cell contents homogeneous, 

 blue-green. 



Hawaii. Growing on Cladophora filaments, in mountain stream. 

 Waipio Valley, Hawaii. July 1900. (Tilden). 



228. Lyngbya versicolor (Wartman) Gomonl. Monogr. Oscill. 167. pi. 4. 



f. 4, 5. 1893. De Toni. Syll. Algar. 5: 282. 1907. 



