Page:The Habitat of the Eurypterida.djvu/138

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 * The Habitat of the Eurypterida figure 12.jpg
 * The Habitat of the Eurypterida figure 12.jpg


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with that made by Laurie at the time when he described the eurypterid fauna from these beds. He says: "The rock in which the Eurypterids are preserved is an irregularly fissile fine-grained sandstone, containing a considerable amount of carbonaceous matter