Explanation of the Chart. 



The Chart has been compiled from Plate II of Dr. Ernst Koken's Die 

 Vorivelt und Hire EntmckeltmgsgescMchte, and shows the supposed coast-lines of 

 the Tertiary Continents. 



The present coast-lines are indicated by dotted lines. 



The supposed Tertiary coast-lines of Koken are indicated by thick black 

 lines. 



The Great Inland Sea, stretching from the present Gulf of Mexico to the 

 present Arabian Sea, is coloured dark blue. 



The Chart is meant to elucidate the theory advanced in the text as to the 

 origin of a considerable part of the Fish Fauna of India, especially that of the 

 Oligobenthus. 



