BRANNER: THE STONE REEFS OF BRAZIL. oT 
dropped a little as if undermined and let down in place right in the 
body of the reef. 
ANN AM == RR 
WIE 
AN 
N 
Fic. 28. Pedra de Galé reef. From a photograph taken at low tide. 
Both on the outside or seaward face and on the inside 
blocks have broken off and been let down at var 
Barnacles cover much of the surface. 
square-faced 
lous angles, 
In the surface tide-pools Porites 
