Note 2759 — BOOK IX. THE NATURAL HISTORY OF FISHES. (continued 2)

He alludes to various kinds of sea-animals, called sea-lice and sea-fleas. Cuvier says, that there are some crustacea which have been called sea-fleas and sea-lice, some of which kinds are parasites, and are attached to various fishes and cetacea. Thus, he says, a pycnogonum is commonly named “pediculus balænæ,” or the “whale-louse;” one of the calygæ is called the “fish-flea,” another the “mackerel-flea.” The name of sea-flea, he observes, has been given more especially to a very diminutive kind of shrimp, in consequence of its power of leaping from place to place.