Nothing can exceed the fury with which the bull-dog falls upon all other animals, and the invincible obstinacy with which he maintains his hold. In attacking the bull, he always assails him in front, and generally fastens upon his lip, tongue, or eye, where he holds and hangs on, in spite of the most desperate efforts of the other to free himself from his antagonist, which affords ample proof of the amazing strength and power of this animal. Whenever a bull-dog attacks any of the extremities of the body, it is invariably considered a mark of his degeneracy from the original purity of blood. Puppies will assail a bull, and thereby give a decided proof of their breed, when only six months old; and, if permitted, will rather suffer themselves to be destroyed than relinquish the contest. Although this trial is sometimes made with the whelps of a particular litter, to demonstrate the purity of their descent, and to prove that there has been no improper cross by which the future fame of their posterity may be affected, yet they are seldom entered in a regular ring until from fifteen to eighteen months old. But their ligaments cannot be considered as at their full strength until they are at least two years old. Indeed, amateurs say, that they are not at their prime until they have attained four or five years of age. The bull-dog is admitted by naturalists to be one of the original and peculiar races of Britain, and may be ranked, in point of originality, with the shepherd’s dog and Irish greyhound. In various districts of England this breed is still preserved in its native purity, by that class of people who delight in bullbaiting and fighting of dogs; both of which amusements, alike inhuman, are now happily on the decline.—_Brown._ BULL-HEAD, _s._ The name of a fish. The bull-head seldom exceeds the length of three inches and a half; the head is large, broad, flat, and thin at its circumference, being well adapted for insinuating itself under stones; on the middle part of the covers of the gills is a small crooked spine turning inwards; the eyes are very small, the irides yellow; the body grows slender towards the tail, and is very smooth; the colour is as disagreeable as its form, being dusky, mixed with a dirty yellow; the belly whitish. They are found all the summer in holes, among mud and gravel, and among weeds and flat stones in clear water, where they may be seen sunning themselves in a hot day; put the hook, with a small red worm, before them, and they will instantly take it. Notwithstanding the disgust which the form of the bull-head creates, the largest, when the heads are cut off, are very delicious eating; they are also good baits for other fish. Some anglers think them, when their gill-fins are cut away, preferable to the minnow.—_Daniel._ BULL TERRIER (_Canis Pugilis_), _s._