Heterodontus vincenti tooth collected from the Eocene Bracklesham Beds in Lee on Solent, Hampshire. Heterodontus vincenti is an extinct horn shark. Modern horn sharks capture their prey by suction and their diet consists of hard shelled mollusks, crustaceans and echinoderms. Once trapped in the mouth of the horn shark lateral teeth are used to grind down the hard shells of the prey item. These tooth specimens are lateral teeth and they measure approximately 6 to 10 mm in length. The Bracklesham beds in which these teeth were found are well known among paleontologists and fossil collectors in Britain; they have yielded over 160 different species of fish and the beds continue to be productive today despite having been pillaged by collectors for over 100 years.