Myxophyceae 185 



gonidia not contiguous to the heterocysts, often numerous, yellowish 

 brown. 



Var. genuina Bornet and Flahault. 1. c. 246. De Toni. 1. c. 433. 



Riddle. Brush Lake Algae. Ohio Nat. 5: 268. 1905. Collins, Holden 

 and Setchell. Phyc. Bor.-Am. Fasc. 27. no. 1307. 1906. 



Filaments 8-12 mic. in diameter; gonidia usually 12 mic. in diameter, 8-9 

 mic. in length. 



Maine. Among Cladophora expansa, etc., in marsh pools. 

 Stover's Point, Harpswell. July 1906. (Collins). Ohio. Brush Lake, 



Champaign County. 1902. (Riddle). 



Var. litorea (Kuetzing) Bornet and Flahault. 1. c. 246. De Toni. 1. c. 

 434- 



Collins. Notes on New England Marine Algae. IV. Bull. Torr. Bot. 

 Club. 11: 130. 1884; Preliminary Lists of New England Plants. V. Marine 

 Algae. Rhodora. 2: 42. 1900. 



Plate IX. fig. 7, 8. 



Filaments 12-16 mic. in diameter; gonidia about 14 mic. in diameter. 

 10 mic. in length. 



Maine. (Collins). New Hampshire. A few filaments among other 

 algae in marshes. Hampton. (Collins). Massachusetts. (Collins). 



Var. major (Kuetzing) Bornet and Flahault. 1. c. 247. De Toni. 1. c. 

 435- 



Collins. Preliminary Lists of New England Plants V. Marine Algae. 

 Rhodora. 2: 42. 1900. Setchell and Gardner. Algae of Northwestern Amer- 

 ica. Univ. Calif. Pub. Bot. i: 193. 1903. Collins, Holden and Setchell. 

 Phyc. Bor.-Am. Fasc. 21. no. 1012. 1903. Collins. Phycological Notes of 

 the late Isaac Holden. — II. Rhodora. 7: 223. 1905. 



Filaments 12-18 mic. in diameter; gonidia 14-15 mic. in diameter, 6-7 

 mic. in length. 



Connecticut. Scattered filaments among other blue-green algae. In 

 marsh pool. Cook's Point. (Holden). Washington. In a pond of slight- 

 ly brackish water. Penn's Cove, near Coupeville, Whidbey Island. June 1901. 

 (Gardner). 



346. Nodularia mainensis F. L. Harvey. The Fresh-water Algae of Maine. 



II. Bull. Torr. Bot. Club. 16: 188. 1889. De Toni. Syll. Algar. 5: 



435- 1907- 



Sheaths distinct but close; trichomes 33-38 mic. in diameter; cells 



2-6 mic. in length; heterocysts compressed, oval, orange yellow or brownish 



j-ellow. 



Maine. Found intermingled with Vaucheria sessilis in Pushaw 

 Stream, a tributary of the Penobscot, near Orono. July 1888. (F. L. Harvey). 



Genus ANABAENA Bory. Diet. Class, i: 307. 1822. 



Sheaths not present or when present often diffluent; trichomes equal 

 throughout or tapering at the apices, usually rigid and fragile, sometimes 



