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Show 510 MESSRS. MOLE AND URICH ON THE [June 19 HERPETOBRTAS CARINATUS. This is another very lively and swiftly moving serpent, and w e recollect chasing one a distance of 40 yards before catching it. Its underparts or rather sides are bright yellow; the ventral scales are paler, being edged with silver and a line of dark brown. The back is of a bronze-green colour, and the yellow scales on the sides have an edging of dark brown. The scales covering the spine are in pairs and are keeled, while the remainder are smooth. Another peculiarity about the scales is that those beginning at the back of the head for a considerable distance along the spine are minutely pitted at the extremities furthest away from their attachment. This snake is one of the most beautiful in the island. It feeds on frogs, and is found alike in trees and grassy savannas. W e recollect well the first time w e encountered it. W e were shooting on the Caroni River when our attention was attracted by a streak of pale yellow dangling from a palm (Bactris, sp.) over the water. The reptile was gracefully turning its small head and brilliant eyes from side to side, as if admiring its perfect symmetry of form mirrored in the water beneath it. W h e n caught, the Machete (local name) bites with surprising rapidity and lashes with its long tail in a manner not at all pleasant to its captor. One we had in our possession laid five eggs-each 2 inches long and as thick as the little finger. AH.ETULLA LIOCERCUS. Locally known as " Lora," a Spanish word for parrot, because the sheeny iridescent greenish gold on the neck and anterior portion when inflated is thought to be like the hues of the feathers on the neck of the yellow-crested green parrot. Ordinarily, this snake has a commonplace grey colour. Its head is of a dark greenish-brown colour, with an under surface of white. W h e n caught, it opens its enormous mouth to its fullest extent and threatens in a most ferocious, but at the same time somewhat absurd, manner. It rarely bites, but when it does it is apt to inflict small "wounds with the two long teeth which are placed one on each side in the posterior parts of the upper jaw-bones. They are exceedingly slender reptiles and their heads at first sight appear large and dis-proportioned to the rest of their bodies. They frequently reach a length of 3^ and even 4 feet. They feed on frogs and lizards. O n several occasions lizards which have been partially swallowed by these snakes and have escaped have died soon afterwards. The Lora is swift in its movements, and when rushing along on a level surface the outside portions of its curves do not appear to touch the earth. OXYBELIS ACUMINATA. This remarkable-looking tree-snake has a sharply pointed snout, which in some individuals has the under jaw tinged with yellow, in others white. The general colour is greenish drab, sometimes |