ORTHIS
Source: 567
‖Or″this (ôr″thĭs), n. [[NL., fr. Gr. ορθὄσ straight.]] (Zoöl.) An extinct genus of Brachiopoda, abundant in the Paleozoic rocks.
Source: 567
‖Or″this (ôr″thĭs), n. [[NL., fr. Gr. ορθὄσ straight.]] (Zoöl.) An extinct genus of Brachiopoda, abundant in the Paleozoic rocks.