The Pangolins are of medium size; they never exceed a yard in length. They are natives of the Old World exclusively; India and the Malay Isles, the south of China, and a great part of Africa, are the regions in which they are usually found. Although the animals look at first sight like curious, heavy-bodied Lizards, they have warm blood, and nourish their young like the rest of the Mammalia. The Pangolin lives in burrows in the earth, or sometimes in the large hollows of colossal trees which have fallen to the ground. The burrows are usually made in light soil on the slope of a hill. There are two holes to each gallery: One for entrance, and another for exit. This is quite necessary on account of the animal being quite incapable of curving its body sideways, so that it cannot turn itself in its burrow. The bodies of Pangolins are very flexible vertically—that is, they can roll themselves up into a ball, and coil and uncoil themselves very readily—but they cannot turn round within the confined limits of their burrows. “In hunting them,” says M. Du Chaillu, “we had first to ascertain by the foot-marks, or more readily by the marks left by the trail of the tail, which was the entrance and which the exit of the burrow, and then making a trap at one end, drive them out by the smoke of a fire at the other, afterwards securing them with ropes. “Their flesh is good eating. Those I captured were very lean, but I was informed by the natives that they are sometimes very fat.” RODENTIA—GNAWING QUADRUPEDS. THE order of animals to which the well known and widely distributed Rats and Mice belong, is a very large one, including animals that are adapted, according to the genus, either for running, jumping, climbing, flying or swimming. They are armed with sharp claws, enabling them to climb trees or burrow in the earth. But the special characteristic of all the animals of this group, is that they possess only two kinds of teeth—incisors and molars. The incisors, two in number, in front of each jaw, are very remarkable. Their office is to cut, as with shears, roots and branches, and they are wonderfully constructed for this purpose. These teeth are long, stout and curved, and being covered with enamel on their front face only, they wear away more behind than in front; and by rubbing one against the other naturally form a bevelled edge. They therefore keep a hard edge that is always sharp-cutting, ready for sawing through or gnawing tough substances. Another strange thing about these teeth is that they always keep the same length, notwithstanding their continual wear. The fact is, they have no roots, and grow from the base in the same proportion as they are worn away at the top.