Straight Chambered Shell

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Chambered shell, endless in their variations, in the earliest periods were a species with simple septa and straight shells as in Ormoceras tenuifilum, which shows a large annulated central siphon.


Winchell, Alexander Sketches of Creation (New York, NY: Harper & Brothers, 1870)


TIFF (full resolution)

1082×2400, 1.2 MiB

Large GIF

461×1024, 164.9 KiB

Medium GIF

288×640, 77.4 KiB

Small GIF

144×320, 23.6 KiB