Aëtius professes to derive his account of the dracunculus from Leonides. He says, like our author, that it is formed most commonly in the legs and muscular parts of the arms in India and Ethiopia, and that the generation of it is not dissimilar to that of intestinal worms. He adds, that in process of time suppuration takes place at the end of the worm, when an opening is made in the flesh, and the head of the dracunculus protrudes. If dragged out considerable disturbance is produced, especially if the worm should be broken, for what remains occasions the most excruciating pains. He directs us, therefore, to put a ligature round the arm, and to tighten it every day so that the dracunculus may come forth by degrees without breaking. The part is to be washed with honied water, with oil in which wormwood or southernwood has been boiled, or with some such anthelminthic decoction; but all acrid things are to be avoided for fear of inflammation. He recommends us to forward suppuration by means of maturative cataplasms, and the other means mentioned by our author. Pollux calls the dracunculus a piece of _corrupted nerve_ which sometimes comes from the sores of Ethiopians, but seldom troubles other people. Actuarius, like our author, mentions that the dracunculi occur most commonly in the region above Egypt, being generally formed in the muscular parts, and that in process of time the part becomes livid and suppurates. They are killed, he adds, by bitter and acrid things. Avicenna comprehends in his account whatever information could be gleaned from preceding writers. He says the dracunculus is called _vena medine_, from Medine, the name of the country where it is most prevalent. It occasions a blister in the part which bursts, when a red and somewhat blackish substance protrudes and gradually increases in length. He directs us to correct the habit which gives rise to it by baths, humid food, and the like. His treatment is similar to that of Aëtius and our author, namely, binding a ligature round the arm, fastening a piece of lead to the worm, using fomentations of warm water, and the like. Haly Abbas mentions the vena as being a worm which forms principally in the legs of the inhabitants of warm countries, such as India, Egypt, Ethiopia, and Lybia. Avenzoar says that the complaint most commonly attacks negroes, being formed by gross humours, for dispelling which he recommends internally various sharp and acrid medicines, such as squills, nettles, colocynth, &c. He further directs a piece of lead to be bound firmly over the worm so that it may be made to crawl out gradually, which, however, he says, will not be accomplished in less time than a year. Alsaharavius states the danger of breaking the worm (vena). He recommends the same treatment as Avicenna. The conclusion of his chapter on the dracunculus decides him to be the same person as Albucasis.