376 ALLAX HAXCOCK PACIFIC EXPEDITIOXS VOL. 12 



PLATE 30 



Fig. 1. Sargassum pacificum f. mcgapliylliirn. A portion of the 

 axis of a plant showing the small receptacles, large 

 vesicles, and the very large blunt leaves with irregular, 

 coarse, often bifurcate serrations and highly asymmetric 

 bases. I. Isabela. x 1.2. 



