THE 



NATURE-PRINTED 



BRITISH SEA-WEEDS: 



A HISTORY, 



ACCOMPANIED BY FIGURES AND DISSECTIONS, OF THE 

 ALO^ OF THE BRITISH ISLES. 



BY 



WILLIAM GROSART JOHNSTONE, F.B.S.E., 



AKD 



ALEXANDER CROALL, A.B.S.E. 



NATURE-PRINTED BY HENRY BRADBURY. 



IN FOUR VOLUMES. 



VOL. Ill —MELANOS PERM E/E. 



LONDON: 

 BRADBURY AND EVANS, 11, BOUVERIE STREET. 



1860. 



