Coiled Chambered Shell

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Following the species of simple septa and straight shells, came the Trocholites ammoulus, of simple septa and coiled chambered shells of the Trenton period.


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


TIFF (full resolution)

2400×2029, 1.9 MiB

Large GIF

1024×865, 269.7 KiB

Medium GIF

640×541, 135.0 KiB

Small GIF

320×270, 43.7 KiB