Cerebrum ( Obersteiner & Hill, 1900 ) : Synonym for endbrain (Kuhlenbeck, 1927). It was used in this way by for example Obersteiner & Hill (1900, pp. xv, 47), Crosby et al. (1962, p. 356), Williams & Warwick (1980, p. 864), Nauta & Feirtag (1986, p. 43), and Nieuwenhuys et al. 2008, p. 5, Fig. 1.2), but has also been defined in many other ways. Curiously, in English, the Greek (encephalon) and Latin (cerebrum) forms of "brain" are not synonymous (see Oxford English Dictionary, 1989). This goes back to Aristotle, who distinguished a large brain (cerebrum) and small brain (cerebellum, the diminutive of cerebrum); see Swanson (2000) and His (1895, p. 162).