Reptile coprolite - Ichthyosaur.
Coprolite from a marine reptile. Under magnification there are numerous black objects which are almost certainly the 'hooklets 'from Belemnite tentacles.
Jurassic, Lower Sinemurian.
Church Cliff Bay, Lyme Regis, Dorset.
Coprolite : 6.2 x 5.5 cm.