DINOTHERIUM, an extinct mammal, fossil remains of which occur in the Miocene beds of France, Germany, Greece and northern India. An entire skull, obtained from the Lower Pliocene beds of Eppelsheim, Hesse-Darmstadt, measured 41ft. in length and 3ft. in breadth, and indicates an animal exceeding the elephant in size. The upper jaw is destitute of incisor and canine teeth, but possesses five molars on each side, with a corresponding num ber in the jaw beneath. The most remarkable feature, however, consists in the front part of the lower jaw being bent downwards and bearing two tusk-like incisors also directed downwards and backwards. Dinotherium is a member of the group Proboscidea (q.v.).