216 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [DeC. 19, 



I the Gr 

 es, R.N. 



Fig. 4. 



Mop of Santorin in the Grecian Archipelago, from a Survey in 1848, 

 Capt. Graves, R.N. The soundings are given in fathoms. 



^<9 



u -A 

 S7 



S '^^ 



A. Shoal formed by submarine volcanic eruption in 1650. C, Mansell's Rock. 



B. Northern entrance. D. Mount St. Ellas, 1887 feet high. 



Fig. 5. — Section of Santorin, in a N.E. and S.W. direction, from Thera 

 through the Kaimenis to Aspronisi. 



Thera. 

 Sea. Aspronisi. The three Kaimenis 



Aspronisi. 



Fig. 6. — Part of the Section fig. 5, enlarged. 



The three Kaimenis. 

 Old. New. Little. 



Thera. 



