208 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [DcC. 19, 



Fig. 1 . — View of the Isle of Palma, and of the entrance into the cen- 

 tral cavity or Caidera. — From Von Buch's " Canary Islands. "" 



Fig. 2. — Map of the Caidera of Pal ma and the great ravine, called 

 " Baranco de las Angustias.'" — From a Survey of Capt. Vidaly 

 R.N., 1837. 



Juan G 



Pt.,7801t iiisll 



