palearca, palearca

[Pref. palæ-, and Lat. arc a (q. v.).] Palæont.: The name given by Hall, in 1858, to an ancient type of Arcade, of which forty-two species have been found in the Silurian and Devonian of North America and North Wales. Called also Me gas tom us, Cystodonta, and Cypricardites. ( Tate .) pāişe, v. t. [POISE, v.] To weigh, to balance, to and Eng. arctic.] Pertaining to or found in the poise.