Proceedings Am. Philos. Soc. Vol. LII. No. 21 1 



Plate XV 



Sandstone Reef at Natal, Rio Grande do Norte. 



Fig. a. Looking from the old fort along the reef, showing the stranded 

 steamer on the reef at the far side of the bar. 



Fig. b. Looking northeast along the coast from Asylo de Mendicidade, 

 showing the same stone reef. 



Photographs by G. A. Waring, 1912. 



