368 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 3 



PLATE 35 



Figs. 1-6. Sargassum MacDougalii, Drouet & Richards 3342, 

 showing variation in leaves and vesicles, x 3.75. 



Figs. 7-8. Sargassum MacDougalii, MacDougal, Dec. 1923, two 

 leaf-types, x 3.75. 



Fig. 9. Sargassum Camouii, Johnston's specimen from near 



Guaymas, detail of basal holdfast disk, x 1.25. 



Fig. 10. Sargassum sinicola, Marchant 31, basal holdfast of 



small disk and short, massed rhizoids, x 1.25. 



Figs. 11-13. Sargassum Camouii, Durham's specimen from near 

 Guaymas, showing typical leaf and vesicle form, x 2. 



