in ornithology. See Corvus.

Sea Raven, or corvus marinus of Kongo in Africa, in ichthyology, is about six feet long, and big in proportion; but the most singular circumstance appertaining to this creature is the stone found in its head, to which the natives ascribe some medicinal virtues, and the delicate taste of its hard roe, which is still much admired, when dried in the sun, and becomes as hard as a stone.