280 



Fig. 114 

 Variation in pallets of Teredo navalis 



1. Series of pallets selected to illustrate variation at Crockett, San Francisco Bay. 



2. Series of pallets selected to illustrate variation at Dumbarton, San Francisco Bay. 



3. Series of pallets selected to illustrate variation at Goat Island, San Francisco Bay. 

 All figures X 5. 



