I hesitate to accept Ribot’s classification, inasmuch as we have pointed out that fear is prior to pain. In most lower animals it is hardly probable that not having representations that there is present a fear of pain in advance of the pain itself. Fear under such conditions can only be awakened by an actual sensory experience whether it be painful or not. In fact Ribot himself agrees to the fact that “There is a primary, instinctive, unreasoning fear preceding all individual experience, a hereditary fear.” Perhaps a word may be said in regard to the factor of disgust as having a common basis with fear. It is only by a stretch of imagination, if not by a stretch of words, that fear and disgust can be identified. There may be fear where there is no disgust, and there may be disgust where there is no fear. The two are independent variables, and can hardly be referred to as one and the same fundamental reaction, such as withdrawal and flight. The object of disgust does not preclude approach. The avoidance or aversion, the nausea and vomiting are all subsequent phenomena. Disgust may even follow after an abuse of food, of pleasant or necessary objects of nutrition, such as satiety. The reactions of the fear instinct run the contrary way, approach is precluded from the very start. Fear is not associated with useful objects or events, unless it be in morbid states of fear. And still fear and disgust may become intimately associated when disgust and its objects awaken the fear instinct, and the fear becomes the fear of disgust or of the disgusting object. Disgust is more of a specialized character, and is associated with particular events or specific objects, while fear, in its primitive form at least, is more of a generalized character. In the higher forms of life disgust may be so intimately related to fear that the two become synthesized, so to say, and are felt like one emotional state, the state becoming one of fear disgust. In such cases the fear instinct, fear disgust, is a determining factor of the morbid state. This is confirmed by clinical experience of the various cases of psychopathic functional neurosis and psychosis. In the various morbid states of the depressive types fear is awakened long before any pain is actually suffered, or any particular cause is found by the patient to account for the terror that dominates his mental life. The fear comes first while the representative cause is assigned by the sufferer as the cause of the fear. Similarly in the functional psychosis and neurosis the object, experience, event, may be quite ordinary without any suggestion of pain or distress in it. In fact, the experience may be indifferent or even pleasant, but when associated with the fear instinct may become the nucleus of a very distressing pathological state. The experience is the _occasion_, while the fear instinct, the intimate companion of the impulse of self-preservation, is the only cause of functional psychopathic maladies.