Ichthyosaur - probably Stenopterygius sp.
Split nodule off the beach. Inside is a complete vertebra from an Ichthyosaur. Repair straight across the vertebra where the pebble broke. Nice example.
Jurassic, Upper Toarcian, Whitby Mudstone Formation.
Port Mulgrave, Yorkshire.
Vertebra : 3.7 cm. diam.
