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Argillo-areenaceous :: Argillo-areenaceous (a.) Consisting of, or containing, clay and sand, as a soil..

Argillaceous :: Argillaceous (a.) Of the nature of clay; consisting of, or containing, argil or clay; clayey..

Calcareo-argillaceous :: Calcareo-argillaceous (a.) consisting of, or containing, calcareous and argillaceous earths..

Tethys :: Tethys (n.) A genus of a large naked mollusks having a very large, broad, fringed cephalic disk, and branched dorsal gills. Some of the species become a foot long and are brilliantly colored..

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

Spiracle :: Spiracle (n.) A tubular orifice communicating with the gill cavity of certain ganoid and all elasmobranch fishes. It is the modified first gill cleft.

Trematodea :: Trematodea (n. pl.) An extensive order of parasitic worms. They are found in the internal cavities of animals belonging to all classes. Many species are found, also, on the gills and skin of fishes. A few species are parasitic on man, and some, of which the fluke is the most important, are injurious parasites of domestic animals. The trematodes usually have a flattened body covered with a chitinous skin, and are furnished with two or more suckers for adhesion. Most of the species are hermaphrodi

Siphonarid :: Siphonarid (n.) Any one of numerous species of limpet-shaped pulmonate gastropods of the genus Siphonaria. They cling to rocks between high and low water marks and have both lunglike organs and gills.

Aspergillum :: Aspergillum (n.) The brush used in the Roman Catholic church for sprinkling holy water on the people.

Anthobranchia :: Anthobranchia (n. pl.) A division of nudibranchiate Mollusca, in which the gills form a wreath or cluster upon the posterior part of the back. See Nudibranchiata, and Doris..

Analogue :: Analogue (n.) An organ which is equivalent in its functions to a different organ in another species or group, or even in the same group; as, the gill of a fish is the analogue of a lung in a quadruped, although the two are not of like structural relations..

Gill :: Gill (n.) One of the combs of closely ranged steel pins which divide the ribbons of flax fiber or wool into fewer parallel filaments.

Pneumophora :: Pneumophora (n. pl.) A division of holothurians having an internal gill, or respiratory tree..

Nudibranchiata :: Nudibranchiata (n. pl.) 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..

Menobranchus :: Menobranchus (n.) A large aquatic American salamander of the genus Necturus, having permanent external gills..

Dermobranchiate :: Dermobranchiate (a.) Having the skin modified to serve as a gill.

Ascidioidea :: Ascidioidea (n. pl.) A group of Tunicata, often shaped like a two-necked bottle. The group includes, social, and compound species. The gill is a netlike structure within the oral aperture. The integument is usually leathery in texture. See Illustration in Appendix..

Fringilline :: Fringilline (a.) Pertaining to the family Fringillidae; characteristic of finches; sparrowlike.

Sigillative :: Sigillative (a.) Fit to seal; belonging to a seal; composed of wax.

Cryptobranchiate :: Cryptobranchiate (a.) Having concealed or rudimentary gills.

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