Quart. Journ. Geol. Soc. Vol. LXVIll, Pl. VIII. 



FiG.i. 



CONCENTRIC STRUCTURE IN LAVA AT EL BRAZIL (COSTA RICA). 



J.Romanes, Photo. 



Fig. 2. 

 ALLUVIUM, SALINAS BAY, SHOWING THE OLD SEA-CLIFF IN THE BACKGROUND. 



J.Romanes, Photo. 



Bemrose &, Colic, Derb> 



