I. IT is called in Greek, 〈 in non-Latin alphabet 〉〈 in non-Latin alphabet 〉. in Latin, Area, & Ophiasis, à figura; quòd partes glabrae & Pilis destitutae, tor∣tuosae instar Serpentum videntur: in English, a Serpent-like Shed∣ding of the Hair.
II. It is so called from its figure, because that the bald and smooth parts destitute of Hair, are writhed like a Serpent. It be∣gins on the hind-part of the Head, and not exceeding the bredth of two fingers; it creeps towards the Ears, and in some as far as the Forehead, till the two heads meet before: chiefly haunting Infants, and such as are young.
III. In Ophiasis, not only the roots of the Hair, but even the Skin it self is eaten and gnawn through; viz. as deep as the roots of the Hair.
IV. The Causes. The are, in part, the same with the former; and according to Galen, these Diseases follow a depraved Nu∣trition of the Skin of the Head; which if it be in abundance, it eats equally alike thro' the Hair, in many, and greater places; but if less, and mixed with a corrosive Humor, it makes an Ophiasis.
V. The more remote Causes are said to be the heat of the Liver and Head, especially the faults of the first and second Concoction, whence salt and sharp Humors are generated; which tho' they may happen in every Age, yet they generally after Childhood and Youth; sometimes follow∣ing Tinea, Achor, and Favus.
VI. The Signs. It is known by its form, and its creeping along, as before described, with an Ex∣coriation of the Skin; the very colour of it being also changed; and in some it appears more whitish, in some more pale, and in others more black; and if it be pricked, there flows forth a serous, whitish Blood.