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A thin gelatinous tissue separating the ectoderm and endoderm in certain coelenterates. -- Mes`o*gloeal, a.

commonly developed, and the cells around it are at first arranged in two layers, -- the ectoderm and endoderm. The group comprises nearly all animals except the Protozoa.

ee (Bot.), a tree yielding a milky juice, as the cow tree of South America (Brosimum Galactodendron), and the Euphorbia balsamifera of the Canaries, the milk of both of which is wholesome food. -- Milk vessel (Bot.), a special cell in the inner bark of a plant, or a series of cells, in which the milky juice is contain…

o; eighteenmo or 18mo. It is taken from the Latin forms similarly used; as, duodecimo, sextodecimo, etc. A small circle, placed after the number and near its top, is often used for -mo; as, 16°, 18°, etc.

A suborder of Dipnoi, including the Ceratodus. [Written also monopneumonia.]

nd, and generally smooth body; the roundworms. they are mostly parasites. Called also Nematodea, and Nematoda.

ny vertebrates, connects the medullary tube and the primitive intestine. See Illust. of Ectoderm.

tral nervous system and epiderms; as, the neuroepidermal, or epiblastic, layer of the blastoderm.

terior part of the base of the skull are developed; the chorda dorsalis. See Illust. of Ectoderm.

A peculiar larva of certain trematodes which produces cercariæ by asexual reproduction. See Cercaria, and Redia.

A combining form meaning eight; as in octodecimal, octodecimal, octolocular.

The part of the oviduct of certain trematode worms in which the ova are completed and furnished with a shell.

isputation; the proposition of objections to a tenet, as an exercise for a degree. [Eng.] Todd.

t palms in India. Its peculiar nest is attached to the leaf of the palmyra palm. -- Palm toddy. Same as Palm wine. -- Palm weevil (Zoöl.), any one of mumerous species of very large weevils of the genus Rhynchophorus. The larvæ bore into palm trees, and are called palm borers, and grugru worms. They are considered exc…

argely used for building purposes; its fruit and roots serve for food, its sap for making toddy, and its leaves for thatching huts.

to fulfill stated conditions, as not to bear arms against one's captors, to return to custody, or the like. This man had forfeited his military parole. Macaulay.

The albuminous material composing the body of a cytode.

A formative particle of albuminous matter; a monad; a cytode. See the Note under Morphon. Haeckel.

A class of helminthes including the cestodes, or tapeworms, the trematodes, and the turbellarians. Called also flatworms.

A division of trematode worms having more two suckers. Called also Polystomea and Polystoma.