Fishes . Lump-suckers: Cyclopteridae. — The lump-suckers, Cyciop-teridcc, are structurally very similar to the Cottidce, but of verydifferent habit, the body being clumsy and the movementsvery slow. The ventral fins are united to form a sucking diskby which these sluggish fishes hold fast to rocks. The skeletonis feebly ossified, the spinous dorsal fin wholly or partly lost,the skin smooth or covered with bony warts. The slendersubortal stay indicates the relation of these fishes with theCottidcc. The species are chiefly Arctic, the common lump-fish or cock and hen paddle, Cyclopterns Inmpus,
Fishes . Lump-suckers: Cyclopteridae. — The lump-suckers, Cyciop-teridcc, are structurally very similar to the Cottidce, but of verydifferent habit, the body being clumsy and the movementsvery slow. The ventral fins are united to form a sucking diskby which these sluggish fishes hold fast to rocks. The skeletonis feebly ossified, the spinous dorsal fin wholly or partly lost,the skin smooth or covered with bony warts. The slendersubortal stay indicates the relation of these fishes with theCottidcc. The species are chiefly Arctic, the common lump-fish or cock and hen paddle, Cyclopterns Inmpus, aboundingon both shores of the North Atlantic. It reaches a length oftwenty inches, spawning in eel-grass where the male is left to Pareioplits, or Mailed-cheek Fishes 665 watch the eggs. Cyclopterichthys ventricosus is a large specieswith smooth skin from the North Pacific. The Sea-snails: Liparididae. — The sea-snails, LiparididcB areclosely related to the lumpfishes, but the body is more elongate,. Fig. 575,—Lumpfish, Cyclopterus lumpus (Linnaeus). Eastport, Me. tadpole shaped, covered with very lax skin, like the wrinkledskin on scalded milk. In structure the liparids are still moredegenerate than the lumpfishes. Even the characteristic ven-
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