138 



BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY. 



passing the city of Cabo reach the coast at Pedras Pretas some thirty 

 kilometres south of Olinda. 



"With the exception of the sandstone reefs there is not a hard rock 

 exposure on this entire beach from Olinda to Pedras Pretas. It is all 



loose sand heaped by winds and waves a little above high tide-level, and 

 behind the flats of sands near the coast-line are mangrove swamps, old 

 and new, lakes, marshes, varzecvs, and sluggish streams. 



