An opportunity is afforded on the sea-shore of Ceylon for observing a remarkable illustration of instinct in the turtle, when about to deposit its eggs. As if conscious that if she went and returned by one and the same line across the sandy beach, her hiding place would be discovered at its farthest extremity, she resorts to the expedient of curving her course, so as to regain the sea by a different track; and after depositing the eggs, burying them about eighteen inches deep, she carefully smoothes over the surface to render the precise spot indiscernible. The Singhalese, aware of this device, sound her line of, march with a rod till they come upon the concealed nest. _Snakes_.--It is perhaps owing to the aversion excited by the ferocious expression and unusual action of serpents, combined with an instinctive dread of attack[1], that exaggerated ideas prevail both as to their numbers in Ceylon, and the danger to be apprehended from encountering them. The Singhalese profess to distinguish a great many kinds, of which they say not more than one half have as yet been scientifically identified[2]; but so cautiously do serpents make their appearance, that the surprise of persons long resident is invariably expressed at the rarity with which they are to be seen; and from my own journeys through the jungle, often of from two to five hundred miles, I have frequently returned without observing a single snake. Mr. Bennett, who resided much in the south-east of the island, ascribes the rarity of serpents in the jungle to the abundance of the wild peafowl, whose partiality to young snakes renders them the chief destroyers of these reptiles. It is likely, too, that they are killed by the jungle-cocks; for they are frequently eaten by the common barn-door fowl in Ceylon. This is rendered the more probable by the fact, that in those districts where the extension of cultivation, and the visits of sportsmen, have reduced the numbers of the jungle-cocks and pea-fowl, snakes have perceptibly increased. The deer also are enemies of the snakes, and the natives who have had opportunities of watching their encounters assert that they have seen deer rush upon a serpent and crush it by leaping on it with all its four feet. As to the venomous powers of snakes, DR. DAVY, whose attention was carefully directed to the poisonous serpents of Ceylon[3], came to the conclusion that but _four_, out of twenty species examined by him, were venomous, and that of these only two (the _tic-polonga_[4] and _cobra de capello_[5]) were capable of inflicting a wound likely to be fatal to man. The third is the _carawala_[6], a brown snake of about two feet in length; and for the fourth, of which only a few specimens have been procured, the Singhalese have no name in their vernacular--a proof that it is neither deadly nor abundant. But Dr. Davy's estimate of the venom of the _carawala_ is below the truth, as cases have been