SMITHSONIAN CONTRIBUTIONS TO KNOflT^EOGE. 



NEREIS 



BOREAL I-AMERICANA 



OR, 



CONTRIBUTIONS TO A HISTORY OF THE MARINE ALG^ 

 OF NORTH AMERICA. 



WILLIAM HENRY HAEVEY, W.D., M.KLA., 



KEEPER OF THE HERBAKIUM OP THE UNIVERSITY OF DUBLIN ; PROFESSOR OF BOTANY TO THE R. D. S. 

 AND CORRESPONDING MEMBER OF THE NEW YORK LYCEUM OK NATITRAL HISTORY. 



PART II.-RHODOSPERME.a:. 



[a C E P T E I> F (1 !l P II B L I A T I N , J U L Y , 18 5 2.] 



VOL. V. 



