THE FRESH-WATER ALGAE 177 



Plant an unbran 



8 (i) Plant an unbranched filament of one or more rows or cells. 



Bangia Lyngbye 



Structure simple, hair-like; color of different shades of red; attached 

 at one end. Found usually in rapidly-flowing water on wood and 

 stones. 



FlO. 253. Bangia atro-purpurea Agardh. X 225. (After Kiitzing.) 



IMPORTANT REFERENCES ON NORTH AMERICAN FRESH- 

 WATER ALGAE 



Collins, F. S. 1909. The Green Algae of North America. Tufts College 



Stud., Vol. II, No. 3. 1912. Supplement. Tufts College Stud., Vol. 



Ill, No. 2. 

 Conn, H. W. and Webster, L. W. 1908. A Preliminary Report on the Algae 



of Fresh Water of Connecticut. State Geol. Nat. Hist. Surv., Bull. 



No. 10. 

 De Toni, J. B. 1887-1907. Sylloge algarum omnium hucusque cognitarum. 



Vol. I, Chlorophyceae. Vol. II, Bacillariaceae. Padua. 

 Engler, Ad. and Prantl, K. A. E. 1887-1909. Die naturlichen Pflanzenfa- 



miMen. 4V. in 17. Leipzig. 

 Hazen, T. E. 1902. The Ulothricaceae and Chaetophorae of the United 



States. Mem. Torrey Bot. Club, Vol. XI. 

 Pascher, a. 1912. (See list in Chapter I.) 

 Saunders, D. 1894. Protophyta-Phycophyta. Flora of Nebraska, i: 15- 



68. Lincoln. 

 Tilden, J. E. 1909. Minnesota Algae (Schizophyceae) . Minn. Bot. Survey. 

 Transeau, E. M. 1913. Annotated List of the Algae of Eastern Illinois. 



III. Acad. Sci., 6:69-89. 

 Van Heurck, H. 1896. A Treatise on the Diatomaceae. London. 

 West, G. S. 1904. (See list in Chapter V.) 

 West, W. and G. S. 1904-1912. A Monograph of the British Desmidiaceae. 



4V. Ray Soc. PubL, Vol. 42. London. 

 Wolle, Francis. 1884. Desmids of the United States. 1887. Fresh-water 



Algae of the United States. 2V. Text and Atlas. Bethlehem, Pa. 

 i8go. Diatomaceae of North America. Bethlehem, Pa. 



