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An order of fishes having an incomplete or reduced branchial apparatus. It includes the sticklebacks, the flutemouths, and Fistularia.

ne to three larger teeth on the palate (see Illust. of Cyclostomi). There are seven small branchial openings on each side. [Written also lamper eel, lamprel, and lampron.]

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

, but not repeated longitudinally. Most of them develop a mantle, which incloses either a branchial or a pulmonary cavity. They are generally more or less covered and protected by a calcareous shell, which may be univalve, bivalve, or multivalve.

artilage; especially, one of the lower pharyngeals, which belong to the rudimentary fifth branchial arch in many fishes, or one of the upper pharyngeals, or pharyngobranchials, which are the dorsal elements in the complete branchial arches.

has one or two external openings through the nose in the higher vertebrates, and lateral branchial openings in fishes and some amphibias.

arynx, lungs, heart, stomach, liver, and spleen, and, in fishes and many amphibia, to the branchial apparatus and also to the sides of the body.

A small European lamprey (Petromyzon branchialis); -- called also prid, and sandpiper.

The gill of a crustacean in which the branchial filaments are slender and cylindrical, as in the crawfishes.

yo, which open into the pharyngeal portion of the alimentary canal, and correspond to the branchial clefts in adult fishes.