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An eel-shaped ganoid fish of the order Dipnoi, having both gills and lungs. It inhabits the rivers of South America. The name is also applied to a related African species (Protopterus annectens). The lepidosirens grow to a length of from four to six feet. Called also doko.

Any one of several species of fringilline birds of the genera Linota, Acanthis, and allied genera, esp. the common European species (L. cannabina), which, in full summer plumage, is chestnut brown above, with the breast more or less crimson. The feathers of its head are grayish brown, tipped with crimson. Called also g…

quid measure, a measure, or system of measuring, for liquids, by the gallon, quart, pint, gill, etc.

its form. Lobster louse (Zoöl.), a copepod crustacean (Nicothoë astaci) parasitic on the gills of the European lobster.

A Hebrew measure of liquids, containing 2.37 gills. W. H. Ward.

Any one of several species of fringilline birds of the genus Calcarius (or Plectrophanes), and allied genera. The Lapland longspur (C. Lapponicus), the chestnut-colored longspur (C. ornatus), and other species, inhabit the United States.

An order of teleostean fishes, having the gills arranged in tufts on the branchial arches, as the Hippocampus and pipefishes.

A large marine annelid (Arenicola marina) having a row of tufted gills along each side of the back. It is found burrowing in sandy beaches, both in America and Europe, and is used for bait by European fishermen. Called also lobworm, and baitworm.

Any fish belonging to the Dipnoi; -- so called because they have both lungs and gills.

A genus of nemertean worms, parasitic in the gill cavity of clams and other bivalves. They have a large posterior sucker, like that of a leech. See Illust. of Bdellomorpha.

soft, exterior membrane of the body of a mollusk. It usually forms a cavity inclosing the gills. See Illusts. of Buccinum, and Byssus.

A class of Vertebrata, lower than fishes, characterized by their purselike gill cavities, cartilaginous skeletons, absence of limbs, and a suckerlike mouth destitute of jaws. It includes the lampreys and hagfishes. See Cyclostoma, and Lamprey. Called also Marsipobranchiata, and Marsipobranchii.

A large aquatic American salamander of the genus Necturus, having permanent external gills.

hibian (Siren lacertina), found in the Southern United States. It has persistent external gills and only the anterior pair of legs. See Siren. -- Mud frog (Zoöl.), a European frog (Pelobates fuscus). -- Mud hen. (Zoöl.) (a) The American coot (Fulica Americana). (b) The clapper rail. -- Mud lark, a person who cleans…

This is whitish and silky or somewhat scaly above, and bears on the under side radiating gills which are at first flesh-colored, but gradually become brown. The plant grows in rich pastures and is proverbial for rapidity of growth and shortness of duration. It has a pleasant smell, and is largely used as food. It is a…

A liquid measure equal to four gills, or an imperial pint. [Scot.]

A measure equivalent to a gill. [Prov. Eng.]

A division of nudibranchiate mollusks having gills upon the back.

A division of opisthobranchiate mollusks, having no shell except while very young. The gills are naked and situated upon the back or sides. See Ceratobranchia.

Any one of the bony plates which support the gill covers of fishes; an opercular bone.