[B] Hallas, E., Om en ny Zygnema-Art med Azygosporer. Bot. Tidsskrift 20:1-16. 1895.
[C] See Fig. 3, Plate XXV, Amer. Jour. Bot. 1:301. 1914.
[D] Borge, O., Beitrage zur Algenflora von Schweden.
[E] Transeau, E. N., Annotated list of the Algae of Eastern Illinois. Trans. Ill. Acad. Sci. 6:69-89, 1913.
[F] West, G. S., A contribution to our knowledge of the Freshwater Algae of Columbia. Memoires de la Societe neuchateloise des Sciences Naturelles 5:1013-1051. Neuchatel, 1914.
Transcriber's Notes:
The cover image was created by the transcriber, and is in the public domain.
Uncertain or antiquated spellings or ancient words were not corrected.
The illustrations have been moved so that they do not break up paragraphs and so that they are next to the text they illustrate.