4 Rhodora TJANUARY 
ences have been made by number to the principal American exsic- 
catae: Farlow, Anderson & Eaton, Algae Americae-Borealis ; Collins, 
Holden & Setchell, Phycotheca Boreali-Americana ; Tilden, Ameri- 
can Algae. A specific key is suggested under each genus, but it is 
impossible to make a key that will give satisfactory results in every 
case. 
BIBLIOGRAPHY, 
Anderson, Charles Lewis. (1.) List of California Marine Algae, 
Zoe, Vol. II. San Francisco, 1891. 
Anderson, F. W. & Kelsey, Francis D. (1. Common and 
Conspicuous Algae of Montana. Bull. Torr. Bot. Club, Vol. 
XVIII, 1891. 
Ashmead, Samuel. (1.) Catalogue of Marine Algae discovered 
at Beesley's Point, during the past summer, with some remarks 
thereon. Proc. Phil. Acad. Vol. VII, 1855.  (2.) Enumeration 
of the Arctic Plants collected by Dr. S. I. Hayes in his explora- 
tion of Smith's Sound, etc. Proc. Phil. Acad. Vol. XV, 1863. 
Bailey, Jacob Whitman. (1.) Notes on the Algae of the United 
States. Amer. Jour. Sci. ser. 2, Vol. III, 1847. 
Bennett, James Lawrence. (1.) Plants of Rhode Island. Proc. 
Providence Franklin Soc. 1888. 
Britton, Nathaniel Lord. (1.) Catalogue of Plants found in 
New Jersey. Final Report of the State Geologist, Vol. II. Tren- 
ton, New Jersey, 1889. 
Collins, Frank Shipley. (1.) Notes on New England Algae, 
Bull. Torr. Bot. Club, Vol. IX, 1882. (2.) l c. Vol. XI, 1884. 
(3.) Vol. XV, 1888. (4.) Vol. XVIII, 1891. (5.) Vol. XXIII, 
1896. (6.) Marine Algae of Nantucket, in Owen, Maria L., A 
Catalogue of Plants of the County of Nantucket. Northampton, 
1888. (7.) Algae in Rand, E. L. & Redfield, J. H., Flora of 
Mount Desert Island, Maine. Cambridge, 1894. (8.) RHODORA, 
Vol. II, 1900. 
Curtis, Moses Ashley. (1.) Geological and Natural History 
Survey of North Carolina, Part 3, Botany. Raleigh, 1867. 
Dame, Lorin Low & Collins, Frank Shipley. (1.) Flora of 
Middlesex County, Massachusetts. Malden, 1888. 
Eaton, Daniel Cady. (1.) List of Marine Algae collected near 
