_Symptoms in_ =Dogs=. The attack is sudden and unheralded by prodromata. The animal stops, trembles, cries plaintively and falls; he may manage to rise or to do so in part but instantly falls anew. The limbs stiffen, tremble or twitch, the head is extended or flexed, or jerked, violently striking the ground, the mouth open, with abundant saliva, or firmly closed though the tongue may be between the teeth. The trunk may be firm and rigid or alternately twisted in one direction or the other. The eyes roll or squint, and the breathing is stertorous and difficult. Insensibility is complete. Toward the end of the attack there may be a discharge of urine, fæces or semen, the stools often containing worms. The body is often wet with perspiration during or after an attack. The attack usually lasts for two or three minutes, then the convulsions gradually lessen in intensity and finally cease, the dog raises his head, opens his eyes, and gazes inquiringly around. Then he gets on his feet shakes himself and may at once resume his customary habits. In other cases the restoration is less sudden. The dog remains for 30 to 60 minutes dull and stupid, or seems to have little power of control over its muscles and staggers as if intoxicated, or as if the muscles were benumbed. It may drop on its knees and then fall with the head on the ground and repeat this several times. In other cases the dog wanders around, or trots off and may snap at any one interfering with him, so that the case is often mistaken for one of rabies. Finally the animal may remain prostrate and fall into a deep sleep marked by stertorous breathing. _Diagnosis._ The diagnosis of epilepsy is usually easy. The suddenness of the attack, the loss of consciousness, the muscular spasms, the complete temporary recovery and the tendency to recur, form a _toute ensemble_, which is pathognomonic. The danger of confounding this with other nervous disorders is on the whole greatest in the slight cases in which the symptoms are less typical. From =Syncope= it is easily distinguished by the spasms which are not present in syncope.