It is uncertain whether the boa constrictor be found on Java. The serpent usually called the _úlar sáwa_ is a species of coluber, and has been described in one of the volumes of the Batavian Transactions; but several other species are found which arrive at a very large size. One of them, the _úlar lánang_, is very much dreaded by the natives, and said to be poisonous. Of the _úlar sáwa_ there are several varieties, one of which, _úlar sáwa máchan_, is most beautifully variegated. Upwards of twenty serpents are enumerated as poisonous. The _úlar lámpe_ is found at or near the discharge of large rivers into the ocean, and is more abundant in some districts than in others. This is greatly dreaded by the natives; its bite however is rarely mortal, and the effects are comparatively slow, death seldom occurring within twenty-four hours from the time of its infliction. No remedies which deserve notice are known by the natives: charms and superstitious applications are generally resorted to. The most remarkable serpent is the _úlar kádut_, or _kárang_. The úlar lánang, and some of the varieties _úlar sáwa_ are slender, and possess considerable agility. According to the account of the natives, they frequently ascend trees, and suspending themselves by the extremity of their tail, seize upon small animals passing below; but the true _úlar sáwa_ of the Eastern Javans is slow, thick, and unwieldy. Nothing which could illustrate its supposed power of fascination has been noticed. Of the fish most commonly used for food by the natives, many of which are excellent and abundant, thirty-four species of river fish, seven found chiefly in pools or stagnant waters, and sixteen sea fish, are already enumerated by Dr. Horsfield. The classes of amphibia and pisces, doubtless, afford many new subjects for investigation. Valentyn enumerates five hundred and twenty-eight uncommon kinds of fish found in the waters of the Eastern Islands.