Ascarides (Gr.Ascarides 100527 , a term used by Hippocrates, and now applied to several nematoid worms which infest the intestines of man and animals: the ascaris vermicularis, mawworm or pin worm, which infests the rectum or lowest intestine; the tricocephalus dispar, or long thread worm, found in the caecum or upper part of the large intestines; the A. lumbri-coides, or large round worm, mostly found in the small intestines. The body of the large round worm is long, elastic, and fusiform, or tapering at the two extremities; the anterior being somewhat obtuse and furnished with three tubercles, which surround the mouth. (See Entozoa.)