203. _SAND-LAUNCE, SAND EEL, or WRECKLE_ (Ammodytes tobianus), _is a small fish, distinguished by its eel-shape, its head being narrower than the body, the lower jaw much longer than the upper, and the upper lip being doubled._ _There is only one ascertained species of launce: this is found on sandy sea-shores in the Northern Ocean, and seldom exceeds the length of six or eight inches._ From about the end of June to the middle of October these brilliant little fish are caught in great numbers on the southern coasts of England. They are sometimes fished for with seine nets, which have small meshes, and sometimes are dug out of the sand, at low water, with a kind of fork that has three or four short and flat prongs. When eaten perfectly fresh, these are among the richest and most delicious fish that are known. But, to have them in perfection, they should be cooked almost immediately after they are caught. They so soon become putrid that it would be impossible to convey them to any distant market. The inhabitants of some parts of the Continent salt and dry them, and, in this state, they are considered a great delicacy. 204. _The EUROPEAN SWORD-FISH_ (Xiphias gladius, Fig. 57) _is known by having its upper jaw lengthened into a hard and sword-shaped blade; and its dorsal fin long, and lowest in the middle._ _These fish are of steel-blue colour, and measure from fifteen to twenty feet in length._ _They are found in most parts of the European seas._ By the ancient Romans sword-fish were highly esteemed as food; and were killed, with harpoons, by persons stationed in boats for that purpose. They were not only eaten fresh, but were also cut into pieces and salted. The inhabitants of Sicily are, at this day, extremely partial to them, and purchase them, particularly the smaller ones, at very high prices. The parts chiefly in request are those about the belly and tail. In several places, near the Mediterranean, the fins are salted and sold under the name of _callo_. ORDER II.--JUGULAR FISH. 205. _The COMMON COD_ (Gadus morhua, Fig. 58) _is distinguished by having three fins upon its back, a small fleshy beard on the under jaw, the tail fin nearly even at the extremity, and the first ray of the anal fin spinous._ _The average weight of these fish is from ten to twenty, or thirty pounds._ To the inhabitants of many countries, but more especially to those of our own, the cod fishery is a very essential source of wealth. It affords occupation to many thousand persons, and employment for several hundred sail of shipping. The fishery on the great bank near the island of Newfoundland is by far the most important of any that has hitherto been discovered in the world, and the resort of fish to this spot is beyond all imagination numerous. In the year 1791 there were caught more than 750,000,000 pounds weight.