514 DOMAIN XII. VOLCANIC. 



tain marine substances, and he has one in which 

 is distinguished a madrepore, common in the sea 

 of Naples 5 it is the retepora spongites of Linneus, 

 the poms anguinus of Imperati. 



" In the magnificent gardens of the Elector 

 of Hesse Cassel, at Waissenstein, in the midst of 

 a volcanic soil, is found a sandy tufo, filled with 

 beautiful shells of different kinds ; among which 

 I observed the Venus islandica of Lamarck, and 

 the area pilosa of Linneus. 



" I possess in my collection, a shell of the ge- 

 nus cone, in a very hard volcanic tufo, which 

 has filled its interior, found on the sea shore at 

 St. Croix, in Teneriffe; it was given to me by 

 M. Bailly, one of the mineralogists in the ex- 

 pedition of Capt. Baudin. 



Lignite. " 5. I have already mentioned wood changed 

 to coal, which is found at a great depth in the 

 tufo, of the environs of Andernach, and in that 

 of Lipara. 



Plants. " 6. I ought not to pass in silence, the tufo 



of Rochesauve, in Vivarais, of which the beds 

 seem to alternate with other fossile beds of a 

 light marl, which contains leaves of trees and 

 plants, whose fibres are in the most beautiful 

 preservation, but whose parenchyme is black 

 and carbonised. I have a numerous collection 

 of those plants, which I gathered on the spot : I 



