_P. reticulatus_, the Ular Sawad of the Malay countries, found also in Burmah and Siam, has the four front upper labial plates pitted; the frontal plate simple; the head has a narrow, longitudinal, brown stripe. This is one of the most handsomely marked species of the whole family, its body being covered with a gay lacing of black and golden yellow. It is said to attain the great length of thirty feet, and is stout in proportion. In its native wilds the powers of this gigantic reptile are said to be enormous, being able to subdue a full-grown Buffalo; and even a Man has been said to fall a prey to its fury. A Malay prao had anchored for the night under an island of the Celebes. One of the crew had gone ashore in search of the favourite betel nut, and is supposed on his return to the beach to have fallen asleep. In the dead of the night his comrades were roused by his screams; they pulled ashore with all expedition, but came too late; the cries had ceased, and the wretched man had breathed his last in the folds of one of these enormous Serpents. They killed the creature, cut off the head, and carried it, together with the lifeless body of their comrade, to the vessel. The right wrist of the corpse bore the mark of the Serpent's teeth, and the disfigured body showed that the man had been crushed by the constrictive folds of the reptile round the head, breast, and thighs. The Ular Sawad arranges its eggs by placing them in a group, which is covered by the body. This statement, first made by Mr. Bennett, has been confirmed by the observations of M. Lamare Picquot, and by observations on other species of Python in the Jardin des Plantes, Paris, and in the London Zoological Gardens. The Rock Snake of India and Ceylon (_P. molurus_) is another species to which the name of Boa-constrictor has been given. It has the two pairs of front upper, and three hind lower labial shields pitted, and the frontal plates double. Of this gigantic Serpent several specimens are generally to be seen in the Zoological Gardens. III. _Hortulia_, having the upper and lower labial shields deeply pitted; muzzle and forehead with symmetrical shield; nostrils lateral. They are natives of Africa, and three species are known, namely, the Natal Rock Snake, having the lower labial shields deeply pitted, the muzzle and forehead with symmetrical shields, the nostrils lateral; the Guinea Rock or Fetish Snake (_H. Sebæ_), closely resembling the last in many structural points; and the Royal Rock Snake (_H. regia_), having the four pairs of the upper front labials pitted, the upper ocular plate single, the lower labial shields four in number and broad.