In the second division of this family we find several curious specimens before coming to the better known flat Fish which are used for food. The first of these is the Sea-snail, which has a long mucuous body without scales and front fins forming suckers, whereby it can attach itself to the rocks. A curious Lump-fish is also classified here which is very different from the Lump-fish of the Ray family. It has little to distinguish it, except that this also has a strong sucker formed by the disc of the ventral fins. And a third queer specimen is the Echineis—an inhabitant of the Mediterranean, which has a flat disk covering its head, which is formed of a number of movable plates of cartilage. Aided by this queer organ it attaches itself firmly to rocks, and even to ships and larger Fishes which it meets with in its wanderings. Its adhesion to these objects is so strong that the strength of a man often fails to separate them. It sometimes attaches itself to a Shark by means of this strange disk, and makes long voyages on this monstrous locomotive Fish, without fatigue or danger; for its enemies are kept a distance by fear of the fierce monster which carries it. THE FLAT-FISHES OF THE SOFT-FINNED FAMILY. These have peculiar flat bodies, greatly compressed, but in a direction different from the flat Fishes of the Ray family. In the case of the Raia, the body is flattened horizontally, but in the Fishes belonging to this family the bodies are compressed laterally—like that of the well-known Flounder. The head of the Fishes of this group are not symmetrical; the two eyes are placed on the same side, and the two sides of the mouth are unequal. These strange flat Fishes are always turned upon their side, and the side turned towards the bottom of the sea is that which has no eye. It is to this habit of swimming on their side that they owe their popular name of side-swimmers. They advance through the water very slowly compared with the motion of other Fishes. They can ascend or descend in the water very quickly, but cannot turn to the right or left with the same ease as other Fishes. This property of rapidly rising or sinking in the water is more useful to them, as they spend the greater part of their time at the greatest depths, where they draw themselves along the sands at the bottom of the sea, and often hide themselves from their enemies. THE SOLES. These flat Fish have an oblong body, the side opposite to the edges being furnished with shaggy, soft hairs; the nose is round and nearly always in advance of the mouth, which is twisted to the felt side, and furnished with teeth only on one side, while the eyes are on the right side. The Common Sole is from eighteen to twenty inches in length. It is brown on the right, and whitish on the opposite side. Its flesh has a very delicate flavor, and it is said to acquire a finer taste by being kept for several days.