THE CERASTES, OR SHEPHIPHON OF SCRIPTURE.
The word shephiphon, which evidently signifies some species of snake, only occurs once in the Scriptures, but fortunately that single passage contains an allusion to the habits of the serpent which makes identification nearly certain. The passage in question occurs in Gen. xlix. 17, and forms part of the prophecy of Jacob respecting his children: "Dan shall be a serpent by the way, an adder in the path, that biteth the horse's heels, so that his rider shall fall backward."
Putting aside the deeper meaning of this prophecy, there is here an evident allusion to the habits of the Cerastes, or Horned Viper, a species of venomous serpent, which is plentiful in Northern Africa, and is found also in Palestine and Syria. It is a very conspicuous reptile, and is easily recognised by the two horn-like projections over the eyes. The name Cerastes, or horned, has been given to it on account of these projections.
This snake has a custom of lying half buried in the sand, awaiting the approach of some animal on which it can feed. Its usual diet consists of the jerboas and other small mammalia, and as they are exceedingly active, while the Cerastes is slow and sluggish, its only chance of obtaining food is to lie in wait. It will always take advantage of any small depression, such as the print of a camel's foot, and, as it finds many of these depressions in the line of the caravans, it is literally "a serpent by the way, an adder in the path."
HORNED VIPER.
According to the accounts of travellers, the Cerastes is much more irritable than the cobra, and is very apt to strike at any object which may disturb it. Therefore, whenever a horseman passes along the usual route, his steed is very likely to disturb a Cerastes lying in the path, and to be liable to the attack of the irritated reptile. Horses are instinctively aware of the presence of the snake, and mostly perceive it in time to avoid its stroke. Its small dimensions, the snake rarely exceeding two feet in length, enable it to conceal itself in a very small hollow, and its brownish-white colour, diversified with darker spots, causes it to harmonize so thoroughly with the loose sand in which it lies buried, that, even when it is pointed out, an unpractised eye does not readily perceive it.
Even the cobra is scarcely so dreaded as this little snake, whose bite is so deadly, and whose habits are such as to cause travellers considerable risk of being bitten.
The head of the Viper affords a very good example of the venomous apparatus of the poisonous serpents, and is well worthy of description. The poison fangs or teeth lie on the sides of the upper jaw, folded back, and almost undistinguishable until lifted with a needle. They are singularly fine and delicate, hardly larger than a lady's needle, and are covered almost to their tips with a muscular envelope, through which the points just peer.