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POPULAR SCIENCE MONTHLY.
![](http://upload.wikimedia.org/wikipedia/commons/thumb/f/fa/PSM_V60_D210_Pelvetia_of_the_west_coast_high_tide.png/500px-PSM_V60_D210_Pelvetia_of_the_west_coast_high_tide.png)
Fig. 11. A Group of Pelvetia, a Characteristic high-tide Wrack of the West Coast.
![](http://upload.wikimedia.org/wikipedia/commons/thumb/b/b0/PSM_V60_D210_Flora_of_the_seashore.png/500px-PSM_V60_D210_Flora_of_the_seashore.png)
Fig. 12. The Upper, or Hedophyllum Zone, of the Kelp Formation is shown in the Foreground. In the Middle Distance Alaria and Laminaria bongardiana with Plants of Egregia are the Abundant Forms.