Galen mentions that bitters in general are destructive of intestinal worms. The teres, he adds, is killed by the absinthium; but the latus and ascaris require stronger medicines, such as the filix. The author of the ‘Isagoge,’ a work generally ascribed to Galen, divides intestinal worms into the broad, the round, and the ascarides. The round are about the length of a span or somewhat more, especially such as are formed about the stomach. The ascarides are short, and form in the rectum. The broad, called also fasciæ or tæniæ, from their resemblance to tape, are said to be sometimes the length of the intestines. The round are most common in children, the ascarides before manhood; and these are difficult to remove except by bitters, elecampane, and acrid food. Oribasius treats briefly of lumbrici, recommending for the l. rotundus, southernwood, wormwood, calamint, gith, &c., taken internally or applied outwardly; for ascarides, the juice of calamint, and cedar rosin, in like manner; and for the tænia the bark of the root of mulberry, and the roots of fern in honied water, and also the root of the white chamæleon and costus. Aëtius gives a full and accurate detail of the symptoms and treatment of lumbrici, but as his remedies are much the same as our author’s, it will be unnecessary to deliver any account of them. He remarks, that anthelminthics either kill worms by their acrimony, or remove them by their bitterness, or irritate them so as to expel them, or by lubricating the parts facilitate the expulsion of them. Actuarius gives a sensible account of the formation of worms, which he ascribes to putrefaction or indigestion. White worms, he says, are the product of indigestion, but the red, and those of any other colour, arise from putrefaction. Nonnus merely abridges our author’s account of this subject. The ingredients in the compositions recommended by Myrepsus, are such as aloes, scammony, southernwood, and bitter almonds. Octavius Horatianus gives a good account of worms, but it contains scarcely anything that is not to be found in our author’s. He says, that from long experience he had great confidence in a purgative draught consisting of scammony, the ashes of burnt peas, euphorbium, and nitre, given in sweet wine. But garlic, and other acrid things, are to be first eaten.