32 



MR. E. LEONARD GILL ON THE PERMIAN 



bones are represented in the fossils by little flattened, semi- 

 transparent pieces of a substance resembling sugar-candy. They 

 were probably not very strongly calcified, and the flattening may 



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have expanded their shape to some extent, but a comparison of 

 diflferent parts does not suggest that much allowance need be 

 made for alteration of this kind. 



