For this last purpose, some persons cut off the legs of two frogs, and then macerate the bodies in two heminæ of wine, recommending this preparation as a collutory for strengthening loose teeth. Others attach the frogs, whole, to the exterior of the jaws:[224] and with some it is the practice to boil ten frogs, in three sextarii of vinegar, down to one-third, and to use the decoction as a strengthener of loose teeth. By certain authorities, too, it has been recommended to boil the hearts of six-and-thirty frogs beneath a copper vessel, in one sextarius of old oil, and then to inject the decoction into the ear on the same side of the jaw as the part affected: while others again have used, as an application for the teeth, a frog’s liver, boiled, and beaten up with honey. All the preparations above described will be found still more efficacious if made from the sea-frog.[225] In cases where the teeth are carious and emit an offensive smell, it is recommended to dry some whale’s[226] flesh in an oven for a night, and then to add an equal quantity of salt, and use the mixture as a dentifrice. “Enhydris”[227] is the name given by the Greeks to a snake that lives in the water. With the four upper teeth of this reptile, it is the practice, for the cure of aching in the upper teeth, to lance the upper gums, and with the four lower teeth, for aching in the lower. Some persons, however, content themselves with using an eyetooth only. Ashes, too, of burnt crabs are used for this purpose; and the murex, reduced to ashes, makes an excellent dentifrice. CHAP. 27.—REMEDIES FOR LICHENS, AND FOR SPOTS UPON THE FACE. THE DOLPHIN: NINE REMEDIES. COLUTHIA OR CORYPHIA: THREE REMEDIES. HALCYONEUM: SEVEN REMEDIES. THE TUNNY: FIVE REMEDIES. Lichens and leprous spots are removed by applying the fat of the sea-calf,[228] ashes of the mæna[229] in combination with three oboli of honey, liver of the pastinaca[230] boiled in oil, or ashes of the dolphin or hippocampus[231] mixed with water. After the parts have been duly excoriated, a cicatrizing treatment ought to be pursued. Some persons bake dolphin’s liver in an earthen vessel, till a grease flows therefrom like oil[232] in appearance: this they use by way of ointment for these diseases.