The 'post-mortem' appearances were the abdomen containing from four to five pints of fluid, having much the character of, but more bloody than, that found in cases of ascites. The peritoneum seemed to be dyed from its immersion in this fluid, as it showed a general red hue, not apparently deeper in some parts than in others. There was an absence, to a great extent, of that beautiful appearance and well-marked course of the minute blood-vessels which accompany many cases of original peritonitis. Extending the examination, I found the bladder to be ruptured, and that the fluid of which I have spoken was to a large extent composed of urine, mingled with some other secretion from the peritoneal investure of the abdomen and its viscera, probably produced from the presence of an irritant, the urine being brought into direct contact with the membrane. Farther research showed that this rupture of the bladder was caused in the manner which I have stated. The 'post-mortem' examination displayed a chronic enlargement of the prostate gland of a considerable size, causing by its pressure a mechanical obstruction to the passage of the urine. Death in this instance was not immediately brought about by the abnormal state of the original organ affected; but the prostate gland, having early in the life of the animal become diseased, and, being gradually increased in size, became a cause of still more serious disease, attacking more important organs. WORMS. There are various kinds of worms to which the dog is subject; they have occasionally been confounded with each other; but they are essentially different in the situations which they occupy, and the effects which they produce. The 'ascarides' are small thread-like worms, generally not more than six or ten lines in length, of a white colour, the head obtuse, and the tail terminating in a transparent prolongation. They are principally found in the rectum. They seem to possess considerable agility; and the itching which they set up is sometimes absolutely intolerable. To relieve this, the dog often drags the fundament along the ground. All the domesticated animals are subject to the annoyance which these worms occasion. They roll themselves into balls as large as a nut, and become entangled so much with each other that it is difficult to separate them. Sometimes they appear in the stomach, and in such large masses that it is almost impossible to remove them by the act of vomiting. It has been said that packets of ascarides have been collected in the stomach containing more than one hundred worms. These collections are rarely or never got entirely rid of. Enormous doses of medicine may be given, and the worms may not be seen again for several weeks; but, at length, they reappear as numerous as ever.