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Having lamellar gills; belonging to the Lamellibranchia. -- n.

Of or pertaining to the Lophobranchii. -- n.

Of or pertaining to the Lophobranchii.

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

The philosophical system of Malebranche, an eminent French metaphysician. The fundamental doctrine of his system is that the mind can not have knowledge of anything external to itself except in its relation to God.

One of the Marsipobranchia.

. 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.

Of or pertaining to a region of the carapace of a crab covering the middle branchial region.

Of or pertaining to the lobe of the carapace of crabs covering the posterior branchiæ.

A division of nudibranchiate mollusks having gills upon the back.

Of or pertaining to the Notobranchiata.

Belonging to the Nucleobranchiata. -- n.

See Heteropoda.

Of or pertaining to the Nudibranchiata. -- n.

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.

Same as Nudibranch.

in which the breathing organs are usually situated behind the heart. It includes the tectibranchs and nudibranchs.

Of or pertaining to the Opisthobranchiata. -- n.

Same as Brachiopoda.