MODE I. MARBLE. 



black, with white belemnites, from Narbonne. 

 The black marbles of Flanders. The pearl grey 

 of Nonette in Auvergne, in which the screw-shells 

 are changed into silex, but easily polished. 



In Italy, some churches of Lucca, Pisa, and 

 Florence, are decorated with a brick red marble, 

 containing white ammonites. The modern ochio 

 di pavone, or peacock's tail, presents round spots, 

 whitish, bluish, or red, being shells cut across. 

 There is also a very pale yellow, with small shells, 

 changed into white transparent spar. 



Spain offers the conchitic marble of Grenada Spain, 

 and Cordova, of a deep red with white shells; and 

 that of Biscay, of a deep black, with shells of a 

 splendid white. The pale yellow of Portugal, as 

 already mentioned, presents marine bodies. 



The marbles of Swisserland, Germany, and the Germany, &c. 

 northern regions, often belong to this description ; 

 but if there were not some striking singularity, it 

 would be unnecessary to enter much into the spe- 

 cification. Those of Basel have astroites and 

 coralites ; of Brunswick, Franconia, &c. belem- 

 nites, ammonites, and cochlites ; of Sweden, ortho- 

 ceratites. 



