_Habits._--A lively, swift snake, living on land and on low bushes, often found near human habitations. Some specimens are very vicious, whilst others show a gentle disposition after a short period of captivity. A specimen nearly 6 feet long, which I kept for some time, never attempted to bite when handled, and some have become so tame as to take food from the hand. The sense of sight appears to be better developed than in any other European snake. The food consists chiefly of mammals, even large rats and young rabbits, birds such as chickens, partridges, and quails, lizards, and other snakes, which, if of considerable size, are not swallowed until paralyzed or killed by the effect of the poison. In Eastern Europe, _Vipera ammodytes_ is said to be the principal enemy of _Coelopeltis_, and the two snakes are consequently seldom found together in the same locality. Many experiments have been made on the action of the poison of this Opisthoglyph. Peracca and Deregibus, as well as, later, Phisalix, found a striking similarity with the symptoms of Cobra poison in their experiments on small animals, the suspension of the respiration occurring in a few minutes, the blood being otherwise unaffected. It has been stated by some authors that _Coelopeltis_ poison has little or no action on man, but a French zoologist, E. Taton-Baulmont, having been bitten in the index-finger by a four-foot-long specimen at Algiers, the swelling extended within thirty hours up to the shoulder, and was accompanied by fever and nervous troubles. As a rule, however, the bite of this snake has no poisonous effect on man, from the fact that the fangs conveying the venom are situated so far back in the mouth as not to come into action. _Reproduction._--According to Werner, the eggs, four to twelve in number, are laid in July, and measure 2 inches in length and 1/2 inch in width. GENUS MACROPROTODON, GUICHENOT Maxillary teeth few and very unequal in size, fourth and fifth or fifth and sixth enlarged and followed by an interspace, the two last teeth fang-like and grooved, situated just behind the eye; sixth mandibular tooth fang-like, and separated from the remainder by an interspace. Head slightly distinct from neck; eye rather small, the pupil vertically elliptic or subelliptic when contracted. Body moderately elongate; scales smooth, with apical pits. Tail moderate or rather short. A single species. 18. MACROPROTODON CUCULLATUS, I. Geoffroy The False Smooth Snake _Form._--Very similar to the Smooth Snakes, with which it has been confounded, but snout broader and very strongly depressed. Tail five and a half to six and a half times in the total length. [Illustration: FIG. 31]