In some instances the acute pain seems to suddenly cease, but there is no general improvement, the patient stands with head depressed, eyes sunken and expressionless, ears lopped, cold perspiration, chilly limbs, unsteady gait and imperceptible pulse. It implies merely a paralysis of the affected bowels in connection with the extensive congestion and extravasation. _Course._ _Duration._ The more acute cases reach their acme with great rapidity, death may occur after two hours illness, and in other cases it may be delayed ten or even twenty-four hours. It may be caused by indigestion and tympany, by volvulus or invagination, by excessive hemorrhage, or by poisoning with toxic matters. Recovery occurs when the vessel blocked is an unimportant one as a branch of the left bundle so that circulation may be reëstablished from collateral trunks; or when a more important trunk has been but partially blocked, and after a time it either clears itself, or collateral circulation comes in with sufficient compensation. There is a more or less rapid disappearance of the colics and other symptoms, a free passage of urine, the rejection of fæces, it may be in a liquid, semi-liquid or sanguineous condition, yet enough to indicate the restoration of intestinal tone. The patient begins to pick morsels of food and soon acquires his former appetite. In some instances, however, the recovery is not complete. Trasbot has noted a case of laminitis occurring within fifteen hours after the improvement, and in other cases there remain chronic debility and catarrh of the intestines. The appetite remains poor, there are occasional colics, the bowels are irregular, loose or costive, and the fæces are dry, glossy and covered with mucus. The back is arched, the belly tucked up, strength and vigor are both lacking, and the patient spends much time in the recumbent position. Complications of various kinds may follow as in other diseases of the intestines. After even the best recoveries, a relapse is always to be apprehended as the original cause remains and the animal is liable to be cut off at any time. _Treatment._ This is very unsatisfactory as the original source of trouble, the worms, being in the blood-vessels, cannot be reached by vermifuges that would be harmless to the host, and clots blocking the smaller intestinal vessels, cannot be dissolved and removed. Moreover, although we could compass the death of the worms in the aneurisms, we would leave their dead bodies as sources of septic change, blood coagulation and embolism.