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A group of fishlike animals including the Marsipobranchiata and Leptocardia.

poma, etc. They have permanent gill openings, but no external gills; -- called also Cryptobranchiata. [Written also Derotrema.]

An order of lamellibranchiate mollusks having an anterior and posterior adductor muscle, as the common clam. See Bivalve.

A genus of nudibranchiate mollusks having a wreath of branchiæ on the back.

A group of wormlike invertebrates having, along the sides of the body, branchial openings for the branchial sacs, which are formed by diverticula of the alimentary canal. Balanoglossus is the only known genus. See Illustration in Appendix.

A genus of nudibranch mollusks having clusters of branchial papillæ along the back. See Ceratobranchia. [Written also Æolis.]

Pertaining to the segments above the epibranchial in the branchial arches of fishes. -- n.

A large division of gastropod molluske, including the Pulmonifera and Opisthobranchiata.

An organ for aquatic respiration; a branchia. Fishes perform respiration under water by the gills. Ray.

A genus of nudibranchiate mollusks, found in the warmer latitudes, swimming in the open sea. These mollusks are beautifully colored with blue and silvery white.

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

One of the Lamellibranchia. Also used adjectively.

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.]

Same as Lamellibranchia.

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

One of the Marsipobranchia.

One of a family of fresh-water pectinibranchiate mollusks, having a turret-shaped shell.

l kingdom, including the classes Cephalopoda, Gastropoda, PteropodaScaphopoda, and Lamellibranchiata, or Conchifera. These animals have an unsegmented bilateral body, with most of the organs and parts paired, but not repeated longitudinally. Most of them develop a mantle, which incloses either a branchial or a pulmonar…

The Marsipobranchiata.

The Marsipobranchiata.