Shell of Nautilus pompilius sliced acrossto show inner chambers. Image from Sanibel Seashell Industries, used with permission. | A mathematical model of Nautilus.Model details. |
Fossil of the Ammonite Astroceras obtusum.Image from Paleopalace.com,used with permission. This specimen, measuring approx. 4 inchesin diameter, is from the lower Lias formation in Dorset, England.It is about 200 million years old. | A mathematical model of Astroceras. Model details.
|
Fossil Ammonite Euhoplites truncatus.Image @2000 Jim Craig from Fossils of the GaultClay and Folkestone Beds of Kent, UK, used with permission. | A mathematical model of Euhoplites. Model details.
|
Fossil Bellerophina minuta. Long thought tobe a cephalopod, recently reclassified in the Gastropoda.Image @2000 Jim Craig from Fossils of the GaultClay and Folkestone Beds of Kent, UK, used with permission. | A mathematical model of Bellerophina. Model details.
|