86 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
face rock still remains in place. А large body of water flows through 
underneath this bridge with every ebbing and flowing tide. 
Om ee me 
OCEAN- SIDE 
Along the landward side the bottom of the channel next to the reef 
is covered here and there by huge blocks of stone like the upper part 
of the reef. There are tide-pools over the surface, especially near the 
landward end. At the outer end the reef breaks off abruptly, and there 
