SMITHSONIAN CONTRIBUTIONS TO KNOWLEDGE. 



NEREIS 



BOREALI-AMERICANA 



CONTRIBUTIONS TO A HISTORY OF THE MARINE ALG^ 

 OF NORTH AMERICA. 



WILLIAM HENRY HARVEY, M.D., M.R.LA., 



KEEPER OF THE HEEBARTOM OF THE UNIVERSITY OF DUBLIN, AND PROFESSOR OF BOTANY TO THE R. D. S. 



PART I.— MELANOSPERME^a:. 



ACCEPTED FOR PUBLICATION 



BY THE SMITHSONIAN INSTITUTION, 



JULY, 1851. 



VOL. III. 



