Belonging also to the class of shell-fish is the dactylus,2847 a fish so called from its strong resemblance to the human nails. It is the property of these fish to shine brightly in the dark, when all other lights are removed, and the more moisture they have, the brighter is the light they emit. In the mouth even, while they are being eaten, they give forth their light, and the same too when in the hands; the very drops, in fact, that fall from them on the ground, or on the clothes, are of the same nature. Hence it is beyond a doubt, that it is a liquid that possesses this peculiar property, which, even in a solid body, would be a ground for considerable surprise.
About This Book
The volume assembles an encyclopedic survey of the known world and its living inhabitants, moving from detailed regional geography and descriptions of seas, rivers, islands, and peoples to extended treatments of humanity, its generation, anatomy, and the origins and inventions of arts. Subsequent books catalog terrestrial animals—their habits, capture, and uses—followed by comprehensive observations on fish and marine creatures, their sizes and behaviors. Accounts mix naturalistic description, reported marvels, medicinal uses derived from animals, and travel and secondhand reports, organized as topical chapters intended as a practical compendium of natural and human phenomena.