Demetrius
3. A native of Bithynia, who is quoted by Heracleides of Tarentum (apud Gal. De Compos. Miedicam. sec. Gen. 4.7, vol. xiii. p. 722), must have lived about the third or second century B. C., as Mantias, the tutor of Heraclides, was a pupil of Herophilus. He is probably the same person as the native of Apamea.
From William Smith (ed.), Dictionary of Greek and Roman Biography and Mythology. Text provided under a CC BY-SA license by Perseus Digital Library, http://www.perseus.tufts.edu, with funding from the National Endowment for the Humanities and Tufts University. Data accessed from https://github.com/PerseusDL/canonical-pdlrefwk/ on 17 October 2026.