Among the more remarkable of the reptiles which the Empire comprised within its limits may be noticed--besides the great saurians already mentioned among the larger animals--the Nile and Euphrates turtles (_Trionyx Egypticus_ and _Trionyx Euphraticus_), iguanas (_Stellio vulgaris_ and _Stellio spinipes_), geckos, especially the Egyptian house gecko (_O. lobatus_), snakes, such as the asp (_Coluber haje_) and the horned snake (_Coluber cerastes_), and the chameleon. The Egyptian turtle is a large species, sometimes exceeding three feet in length. It is said to feed on the young of the crocodile. Both it and the Euphrates turtle are of the soft kind, i.e., of the kind which has not the shell complete, but unites the upper and under portions by a coriaceous membrane. The turtle of the Euphrates is of moderate size, not exceeding a a length of two feet. It lives in the river, and on warm days suns itself on the sandbanks with which the stream abounds. It is active, strong, violent, and passionate. When laid on its back it easily recovers itself. If provoked, it will snap at sticks and other objects, and endeavor to tear them to pieces. It is of an olive-green color, with large irregular greenish black spots. Iguanas are found in Egypt, in Syria, and elsewhere. The most common kind (_Stellio vulgaris_) does not exceed a foot in length, and is of an olive color, shaded with black. It is persecuted and killed by the Mahometans, because they regard its favorite attitude as a derisive imitation of their own attitude of prayer. There is another species, also Egyptian, which is of a much larger size, and of a grass-green color. This is called _Stellio spinipes_: it has a length of from two to three feet. The gecko is a kind of nocturnal lizard. Its eyes are large, and the pupil is extremely contractile. It hides itself during the day, and is lively only at nights. It haunts rooms, especially kitchens, in Egypt, where it finds the insects which form its ordinary food. Its feet constitute its most marked characteristic. The five toes are enlarged and furnished with an apparatus of folds, which, by some peculiar action, enable it to adhere to perfectly smooth surfaces, to ascend perpendicular walls, cross ceilings, or hang suspended for hours on the under side of leaves. The Egyptians called it the abu burs, or “father of leprosy,” and there is a wide-spread belief in its poisonous character; but modern naturalists incline to regard the belief as unfounded, and to place the gecko among reptiles which are absolutely harmless. [PLATE XXVIII., Fig. 1.] [Illustration: PLATE XXVIII.]