_Symptoms_: There are five kinds. An incised wound is a clean cut with a sharp instrument; a lacerated wound is when the skin and other parts are torn; contused when the skin, etc., is torn and the edges are bruised, as when caused by a blow by some blunt instrument or a fall. A punctured wound is one made by some sharp-pointed instrument. A wound of this kind is also often caused by the bite of a dog, one of the tusks penetrating the skin and underneath tissues. Then there is another kind of wound called a fistulous wound, which generally externally is small, but runs deep into the tissues as in fistula of the anus; but the most common seat of a fistulous wound in the dog is in the face, just under the eye, caused generally by some external injury which may not break the skin, but injure the ridge of bone called the zygomatic ridge, resulting in the formation of an abscess which will not heal until the large molar tooth (which is situated underneath the fistula) is removed, and then it heals of itself quickly even though it may have been running for months. Fistulous wounds may form anywhere when an accident has happened to a part and a bone has been injured, and as the result of the inflammation the bone dies, and the wound will not heal until the dead bone comes away either naturally or by operation. Another example of a fistulous wound is found when a dog has swallowed something sharp, such as a pin, needle, bone, or a corn sheck, which may pierce that part of the gullet situated in the neck; as the result, a large abscess often forms, and until the foreign body has come away the wound, the result of the bursting or lancing of the abscess, will not heal. These cases are often very troublesome, as the foreign body causing the mischief may be buried very deeply in the tissues, and when small is difficult to find even with the assistance of the X-rays.