159 



Qoniocora socialis, Romer 



Isastrcea explanata, Goldf. and 1 other sp. 



Tharrmasl/rcea a/rachnoides. Park. 



____ concinna, Goldf. 



Comoseris irradians, Ed. and Haime 

 Protoseris Waltoni, Ed. and Haime 



In France the Etage CoralUen is largely developed and rich 

 in Corals. Some of the best type localities are Saint-Mihiel 

 (Mense,) Tonnerre, (Yonne,) Angouleme, (Charente-Inferienre,) 

 and Nantua, (Ain). 



In Savoy, it is found at Mont Saleve, and m different cantons 

 in Switzerland, as in Neufchdtel, Berne, and Bdle. In Bavaria, 

 at Essingen and Regensburg; in Wurtemberg, at Nattheim, 

 Mnggendorf, and near Heidenham; and in other locahties m 

 GeiLany, as Streitberg, near Hanover, &c. It is likewise 



found in the Morea. ,-,.,.,.. fi-i,^ 



Erom this general view of the geographical distribution of the 

 Corallian zone, it would appear that this formation was composed 

 of a series of Coral reefs in the Jurassic sea, which, during the 

 period of their construction, occupied a large portion of tbe region 

 now constituting the soil of modern Europe ; and that the bed 

 of the Jurassic sea was a slowly-subsiding area of great extent 

 like many parts of the Coral Sea in the Indo-Pacific Ocean of 

 our day. 



