This seems the fitting place to introduce some special remarks on migraine in its relations to other neuralgias of the head, because Eulenburg has mentioned and combated my view, according to which migraine is a mere variety of neuralgia of the ophthalmic division of the fifth nerve. I call it my view, because, though several other authors had previously expressed it, I was first lead to entertain it by observations made before I had studied their works, and especially by the impressive teaching of my own case, as to which more will be presently said. Eulenburg, though he fully allows that migraine is a neuralgia, urges a series of objections to the identification of migraine with ophthalmic neuralgias; of which objections one, based on the doctrine of Du Bois Reymond as to the action of the sympathetic in migraine, must be reserved for consideration when we discuss the general pathology of the vaso-motor complications of neuralgia. The other grounds of distinction that he urges are the following: In the first place, he remarks that the site of the pain is by far less distinctly referred to definite foci on the outside of the skull than in trigeminal neuralgia; the patient's sensations very usually lead him to declare that the pain is in the brain itself. Secondly, he says that the points douloureux (in Valleix's sense) are almost constantly absent in true migraine. Thirdly, he specifies the character of the pain in migraine--dull, boring, straining, etc.--as differing from that of trigeminal neuralgia, which is ordinarily much more acute and darting. Fourthly, he notes the long duration of individual attacks of migraine, and the long intervals (very commonly three or four weeks) between them. Fifthly, he dwells on the frequent prodromata of migraine referable to the organs of sense (flashes before the eyes, noises in the ears), or to the stomach (nausea), or more generally to the reflex functions of the medulla oblongata (_e. g._, convulsive rigors, excessive yawning, etc.)