U. S. B, F. — Doc. 920. 



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m!r 







_/^^-^ 



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FIG. 10. — ROCKS ABOUT THE BASE OF YAQUINA HEAD, 4 MILES NORTH 

 OF YAQUINA BAY. 



These rocks are well covered with sea mussels, bolh Mytiliis edulis and Mytilus californianus 

 occurring here. Little use is made of them as food. See figure 13. 



