Five days into their sail, they witness a battle between an "Ichthyosaurus" and "Plesiosaurus". Marine vertebrates have also been found including ichthyosaurus and plesiosaur. In 1898 a large fossil of an Ichthyosaurus was found locally. Originally described by Owen (1840) as a species of the genus "Ichthyosaurus" ("I. trigonus"). Mary Anning famously found an Ichthyosaurus in the Spittles. Joseph Victor von Scheffels poem "Der Ichthyosaurus" describes its extinction in humouristic verses. The type species was originally described and named as "Ichthyosaurus extremus" by Boulenger in 1904. Other ichthyosaur fossils showed this feature was not limited to "Ichthyosaurus". Coprolites of "Ichthyosaurus" reveal that its diet consisted of fish and squid. The remains from Australia were originally called "Ichthyosaurus australis". Some fossils still had baby specimens inside them, indicating that "Ichthyosaurus" was viviparous. Maisch followed Woodward (1932) and considered "Ichthyosaurus triscissus" to be a valid species of "Stenopterygius". "Stenopterygius" was originally named by Quenstedt in 1856 as a species of "Ichthyosaurus", "I. quadriscissus". Conybeare considered that "Ichthyosaurus" had priority relative to "Proteosaurus". The "Ichthyosaurus" models are based on Triassic or Jurassic fossils from Europe.