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.
Galleries
Squid, Octopus, and NautilusSource
Winchell, Alexander Sketches of Creation (New York, NY: Harper & Brothers, 1870)
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