BROWN AND RED 



149 



FIG. 66. SARGASSUM. 



i. Air vesicles ; b, cylindrical conccptacula 

 c, leaf. 



FlG. 68. HlMANTHALIA. 



(AFTER MURRAY.) 



FIG. 67. DURVILL^A. (AFTER LEM- FIG. 69. a, HORMOSIRA 



MERMANN.) 6, NoTHEIA. 



