Dinotherium giganteum and elephas meridionalis.
"The Old Riddle and the Newest Answer"
John Gerard
At their junction with the chalk there invariably intervenes a bed called the "Stone-bed," composed of unrolled chalk-flints, commonly of large size, mingled with the remains of a land fauna comprising Mastodon arvernensis, elephas meridionalis, and an extinct species of deer.
"The Student's Elements of Geology"
Sir Charles Lyell
With it occurs also an extinct form of Hippopotamus, called Hexaprotodon, and a species of Hippotherium and pig, also two species of Mastodon, two of elephant, and three other elephantine proboscidians; none of them agreeing with any fossil forms of Europe, and being intermediate between the genera elephas and Mastodon, constituting the sub-genus Stegodon of Falconer.
"The Student's Elements of Geology"
Sir Charles Lyell