The Orthoceras was a shelled 'squid-like' nautiloid. They could grow up to 4 metres long and were one of the first great marine carnivores capable of swimming freely. They had a real head with a central brain and large salivary glands.
Today's nautilus is a direct descendant of the Nautiloid, while octopus and squid are indirect descendants.

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Fossil limestone with extinct squids preserved in calcite. Polished on the top surface to show several specimens but one detailed shell running along the middle. The whole piece measures 134mm long and dates to the Devonian of around 375 million years ago. The rock is collected from the Atlas mountains in Morocco.
£6.00 *

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