XXIX. The _Cameleon_ belongs to the Class of Quadrupedes, and is a little Animal resembling a Lizard, but of a larger and longer Head: Its Eyes stand out of its Head above one half of their Globe, which he turns so obliquely, that he sees every thing behind him: Nature perhaps has given it this Advantage, because its Legs (by the slowness of its motion) are of no use to avoid his Enemy, by running away. There is yet something more extraordinary, in the motion of his Eyes, for when one of them moves, the other has no motion at all; one looks upward, the other downwards[206]. Footnote 206: A Journal of the Philosoph. Mathematical and Botanic Observ. by _Lewis Feuillée_, A. D. 1725. The length of these Creatures does not exceed twelve Inches, and they have a proportionable bigness. The Skin is plaited and very fine, transparent, jagged like a Saw, and thin; and must be very compact and hard, since, according to the Historian[207], ’tis not penetrable by the Teeth of Serpents. It has four Feet, and on each Foot three Claws; its Tail is long and flat, with which, as well as with its Feet, it fastens itself to the Branches of Trees: its Nose long, and ends in an obtuse point: In other respects it is made like a Fish; that is to say, it has no Neck[208]: Reckoned by _Moses_, _among the unclean_—Numb. xi. 30. Footnote 207: _Ælian,_ iv. 33. Footnote 208: _Calmet,_ p. 351. The _Cameleon_ is said to transform itself into variety of Colours; perhaps this change may arise from the different reflections of the Rays of Light: Thus they may put on a brown or whitish Habit, from Trees of that Colour, on which they sit. Others observe, that its Colour is changeable, according to the various Passions that agitate the Creature; _e. g._ When affected with Joy, ’tis of an emerald Green, mixt with Orange, etch’d with little grey and black Strokes: Anger gives it a livid and dusky Colour: Fear makes it pale, and like faded yellow[209]. All these Colours compose such a pretty Medley of Shadow and Light, that Nature does not afford a finer Variety of Shadowing, nor our finest Pictures more lively, sweet, and proportionable Drawing. Footnote 209: _Le Compte’s Memoirs_, p. 502. For the further Illustration of this Subject, I shall add something from the Philosophical Transactions about a female Cameleon, the Skin of which appear’d mixt of several Colours, like a Medley-cloth. The Colours discernable are green, a sandy yellow: And indeed one may discern, or at least fancy, some mixture of all, or most Colours in the Skin, whereof some are more predominant, at different times: There are some permanent black Spots on the Head, and Ridge of the Back. But our modern Naturalists assure us, that its common Colour, when it is at rest, and in the Shade, is a bluish grey; when ’tis exposed to the Sun, this grey changes into a darker grey, inclining to a dun Colour: If ’tis put on a black Hat, it appears to be of a violet Colour.