Note 2847 — BOOK IX. THE NATURAL HISTORY OF FISHES. (continued 2)

“Or finger.” The same fish that have been mentioned as “ungues,” or “onyches,” in c. 51 of the present Book. They are a multivalve shell-fish, Cuvier says, which live in hardened mud or the interior of rocks, into which they burrow cavities, from which they cannot retreat; and they can only be taken by breaking the stone. They have a flavour like pepper, and give out a phosphorescent light. See the end of c. 51.