о 
BRANNER: 
of the Cunhahú river, 
where several fragments 
are exposed at low tide. 
The total length of 
the outer reef, including 
the Sibatima end of it, 
and making no allowance 
for breaks and bars, is 
8.4 kilometres. It is 
possible, however, that 
the whole of the north- 
ern end was not seen, as 
the tide was high when 
this part of the coast 
was reached. ‘ 
The pieces that form 
the southern end of the 
reef were not inspected, 
but observations were 
confined to the portions 
accessible from the 
beach at low tide. These 
portions, however, form 
the great bulk of the 
reef, South of the bar 
the outer reef has во pro- 
tected the embayment 
that the water is very 
shallow, and at low tide 
One can walk out to and 
beyond the fragments of 
the inner reef then ex- 
Posed. The sand flats 
between the land and 
the reef contain many 
mollusks similar to those 
whoge Skeletons are 
found in the reef rocks, 
Just north of the Cun- 
hahá bar the reef is 
twenty metres wide. 
This portion of it grad- 
ually approaches the 
THE STONE REEFS OF BRAZIL. 
43 
Е - Ww e ] og taken at low tide. 
18 Ripple marked sands on the landward side of th Cunhahá sandstone reef. From phot graphs ake 
IG. Д 
