124 Puget Sound Marine Sta. Pub. Vol. 1, No. 12 



PLATE 19 



1. Habit sketch of young and old fronds. XV2' 



2. A terminal utricle from the holdfast-cushion with a second utricle 

 growing at the end. X'J'S. 



3-5. Top views of holdfasts. X75. 



6. Utricle of the holdfast-cushion with a second utricle growing from 

 the end^ and a pith-filament branching from the side. X75. 



7. Elongated utricles of the holdfast-cushion ; plugs in various stages 

 of development. X75. 



8. Pith-filament with plugs; holdfast at base. X75. 



