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One of the Trematodea. Also used adjectively.

f 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 hermaphrodite. Called also Trematoda, and Trematoidea. See Fluke, Tristoma, a…

The larval form of a trematode worm having the shape of a tadpole, with its body terminated by a tail-like appendage.

The external male organ of trematodes and some other worms, and of certain Mollusca.

A genus of parasitic, trematode worms, having two suckers for attaching themselves to the part they infest. See 1st Fluke,

A ventral canal or groove, in which the males of some dioecious trematodes carry the female. See Illust. of Hæmatozoa.

The trematode, Bilharzia hæmatobia, which infests the inhabitants of Egypt and other parts of Africa, often causing death.

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

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

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.

An early larval form of a trematode worm; a redia. See Redia.

A kind of larva, or nurse, which is prroduced within the sporocyst of certain trematodes by asexual generation. It in turn produces, in the same way, either another generation of rediæ, or else cercariæ within its own body. Called also proscolex, and nurse. See Illustration in Appendix.

id, usually forming one of a series of larval forms in the agamic reproduction of various trematodes and other parasitic worms. The sporocyst generally develops from an egg, but in its turn produces other larvæ by internal budding, or by the subdivision of a part or all of its contents into a number of minute germs. Se…

An early or simple larval stage of trematode worms and some other invertebrates, which is capable or reproducing other germs by asexual generation; a nurse; a redia.

f or pertaining to the Trematodea. See Illustration in Appendix.

Any one of numerous species of trematode worms belonging to Tristoma and allied genera having a large posterior sucker and two small anterior ones. They usually have broad, thin, and disklike bodies, and are parasite on the gills and skin of fishes.

A gland secreting the yolk of the eggs in trematodes, turbellarians, and some other helminths.

are believed to be analogous in function to the kidneys of vertebrates. See Illust. under Trematodea, and Sporocyst.