Page:Geology and Mineralogy considered with reference to Natural Theology, 1837, volume 2.djvu/36
EXPLANATION OF PLATE 10.
6. Front view of bony plates in the Eye of an Iguana.
7. Profile of the same.
8. Two of the fourteen component scales of the same.
I owe these three last figures to the kindness of Mr. Allis of York.
The spaces between these bones, are covered with the remains of skin; the Epidermis being represented by a delicate film, and the Rete mucosum by fine threads of white Carbonate of Lime; beneath these the Corium, or true skin, is preserved in the state of dark Carbonate of Lime, charged with black volatile matter, of a bituminous and oily consistence.
- Nothing certain has hitherto been known respecting the dermal covering of the Ichthyosauri; it might have been conjectured that these reptiles were incased with horny scales, like Lizards, or that their skin was set with; dermal bones, like those on the back of Cro-