Is it generally known that a snake does everything with its eyes open--that it is denied the privilege of closing its eyes? Such is the indisputable fact. 'But without presuming to trespass on the preserves of men of science, the belief may be expressed that some species, if not in possession of a movable eyelid, have some means of suspending the faculty of sight. Indeed, there is evidence in support of the view that one species has a membranous eyelid similar to, but slighter than, that of a bird. It is not to be doubted that another reptile--the green turtle--is thus endowed, and that the “winking membrane” is found in many animals at the inner angle or beneath the lower lid of the eye. This membrane is represented in animals by a rudiment only. In the eyes of human beings the small reddish patch in the corner corresponds to the winking membrane--indeed, is the vestige of it. In monkeys, and in most mammals below them, there is present in this vestige a small piece of cartilage, and this is found occasionally in man. In white races it is very rare, occurring, as far as observations have shown, in less than one per cent. Recent investigations by Dr. Paul Bartels show that in twenty-five South African natives whom he had examined it occurred in twelve. Another investigation found it five times in twenty-five Japanese. It is curious to find that vestige more common in certain races, as it shows that in this small point they are less advanced than the white race. This quotation from a forgotten source supplies important links in the chain of evidence in favour of the theory that certain species of snakes may have the winking muscle, which exists in marine reptiles and is present in some human beings. Apart from theory, it has been my good-fortune to see a sleeping snake the eyes of which were obscured by a greyish film, giving it the appearance of being “wall-eyed.” Being satisfied that it was blind, for it betrayed no uneasiness at a threatening demonstration, a determination was made to preserve it for critical examination. As soon as the snake was touched the cloudy veils were withdrawn, and the eyes flashed with the fire of malignity. It appeared to be spiteful because it had been caught napping. The specimen was not preserved, although it was bottled.