PLATE 11 



Fig. 1. Section through corbel and creosoted pile cut off too 

 close to the water. Pile and corbel both attacked by Limnoria, 

 where water stood from wave-slop. Creosoted shell of pile not 

 attacked. 



Fig. 2. Ferry slip, San Francisco Bay. Ribbing attached 

 below high water, as shown by bolt heads. Destruction due to 

 Limnoria. 



