The polypus is a preternatural tumour forming in the nose; so called from its resemblance to a sea polypus, because it resembles its flesh, and because, as the animal with its fibrils resists those who would seize on it by catching at their hands, so does this affection, in like manner, block up the nostrils, occasioning inconvenience both in breathing and speaking. Wherefore those kinds of polypi which are hard, unyielding, somewhat livid and malignant, inasmuch as they partake of a carcinomatous nature, are not to be meddled with; but such as are more friable, spongy, insensible, and not malignant, are to be subjected to a surgical operation. Having placed the person on a seat exposed to the rays of the sun, and opened the nostrils with the left hand, and holding in the right hand a polypus scalpel, having its extremity shaped like a myrtle-leaf, we cut around the polypus or sarcomatous tumour, applying the extremity of the instrument to the parts where it adheres to the nose. Afterwards, turning round the instrument, we bring out the separated fleshy body with its concave part. And if we see that the nasal passage is perfectly cleared, we proceed to the cure; but if any part of the polypus be left behind, we take another instrument for eradicating polypi, and, with the extremity thereof, we bring away what remains by stretching, twisting, and scraping it strongly. Malignant polypi we burn with cauteries, knob-shaped; and, after the burning, we have recourse to the treatment for burnt parts. After the operation, having sponged the parts carefully, we inject oxycrate or wine into the nose, and, if the fluid descend by the roof of the mouth to the pharynx, the operation will have been rightly done; but if it does not descend, it is clear that about the ethmoid bones, or the upper parts of the nose, there are fleshy bodies which have not been reached with the polypus instruments. Taking, then, a thread moderately thick, like a cord, and having tied knots upon it at the distance of two or three fingers’ breadths, we introduce it into the opening of a double-headed specillum, and we push the other extremity of the specillum upwards to the ethmoid openings, passing it by the palate and mouth, and then drawing it with both hands, we saw away, as it were, with the knots the fleshy bodies. After the operation, we keep the opening separate by means of a tent resembling the wick of a lamp; and after the third day we consume whatever is left behind by the trochisk of Musa or the like, and at the same time use desiccative applications to the part. Afterwards, we have recourse to epulotic trochisks, and, if necessary, during the whole treatment we keep leaden tubes in the nose. * * * * * COMMENTARY. For an account of the treatment by medicines we refer to section xxiv of the Third Book.