a general name for all kinds of petrified shells, as limpets, cochlea, nautili, concha, lepadus, &c.

CONCINNOUS intervals, in music, are such as are fit for music, next to, and in combination with concords; being neither very agreeable, nor disagreeable in themselves, but having a good effect, as by their opposition they heighten the more essential principles of pleasure; or as by their mixture and combination with them, they produce a variety necessary to our being better pleased.

CONCINNOUS system, in music. A system is said to be concinnous, or divided concinnously, when its parts, considered as simple intervals, are concinnous; and are besides placed in such an order between the extremes, as that the succession of sounds, from one extreme to the other, may have an agreeable effect.