Page:Geology and Mineralogy considered with reference to Natural Theology, 1837, volume 2.djvu/70

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Longitudinal Section of Nautilus Striatus, from the Lias at Whitby, in the collection of Mrs. Murchison. The interior of the Chambers is filled exclusively with calcareous spar, and that of the Siphuncle with Lias. (Original.)

Drawing of the animal of the Nautilus Pompilius, prepared at my request by Mr. Owen, to show the manner in which the siphuncle terminates in the Pericardium. (Original.)