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been obtained ; and here its remains are so plentiful, that, in several 
parts, the buildings are formed of a stone almost entirely composed 
of its vertebrae. But specimens of the body part of the skeleton, 
especially those with any part of the vertebral column attached, are 
now exceedingly rare, which is not to be wondered at, when it is 
considered with what avidity they have been sought ; and that the 
finer specimens, those which have had one side free from the matrix, 
must have almost, of necessity, laid near to the surface of the rock, 
exposed to the search of collectors. The matrix in which these remains 
are found appear constantly to be limestone, and the organic remains 
themselves are always spathose ; but, perhaps, from the deficient propor- 
tion of the crystalline matter, interposed between the animal remains, 
the stone does not, on polishing, yield an appearance sufficiently beautiful 
to occasion its being employed for ornamental purposes. 
