For this animal is deprived of sight; it has no eyes visible, but if the skin a thick one be stripped off the head, about the place in the exterior where eyes usually are, the eyes are found inside in a stunted condition, furnished with all the parts found in ordinary eyes; that is to say, we find there the black part, the part inside it called the pupil, and the fatty part surrounding it; but all these parts are smaller than the same parts in visible eyes.