Nudibranchiata: alternatives and connections

A division of nudibranchiate Mollusca, in which the gills form a wreath or cluster upon the posterior part of the back. See Nudibranch…

A group of bivalve mollusks destitute of siphons, as the oyster; the asiphonate mollusks.

Having two sides; arranged upon two sides; affecting two sides or two parties.

marine or freshwater mollusks having a soft body with platelike gills enclosed within two shells hinged together

The four large shell plates on the sides, and the five large ones of the middle, of the carapace of the sea turtle, which yield the be…

An edifice or structure of heavy timbers or logs for military defense, having its sides loopholed for musketry, and often an upper sto…

A shell; esp. a spherical shell, like those fired from mortars. See Shell.

With temporary gills: -- applied to those Amphibia in which the gills do not remain in adult life.

A proposition in which, after a conclusion from something supposed has been drawn, the order is inverted, making the conclusion the su…

A group of nudibranch mollusks without special gills.

A method of asexual reproduction among the lowest (unicellular) organisms by means of a process of self-division, consisting of gradua…

A genus of nudibranchiate mollusks, found in the warmer latitudes, swimming in the open sea. These mollusks are beautifully colored wi…

The larva or young of the mussel, formerly thought to be a parasite upon the parent's gills.

A shell of the genus Crepidula; a boat shell. See Boat shell.

An extensive artificial division of gastropod mollusks, including those that breathe by gills, as contrasted with the Pulmonifera.

A suborder of marine gastropod mollusks, in which the gills are between the foot and the mantle.

Direct cell division (in which there is first a simple division of the nucleus, without any changes in its structure, followed by divi…

marine or freshwater mollusks having a soft body with platelike gills enclosed within two shells hinged together