(_C_) =To the post-central, angular, and marginal convolutions.= Attacks of focal _epilepsy_ are frequently observed when the tumour occupies the post-central convolution, such developments being probably dependent on forward pressure effects. These epileptiform attacks, however, are almost invariably preceded by some _sensory auræ_. Furthermore, the fits will usually be followed by ‘some degree of anæsthesia or analgesia, a loss of tactile sensation over half the body, affecting mostly the hand and foot, with loss of power and astereognosis (inability to recognize the form and consistency, and to name objects placed in the affected hand)’ (Beevor). When situated in the left angular gyrus, _word-blindness_ may result--inability to appreciate the meaning of written words, &c. When the tumour presses on the optic radiation, _hemianopia_ results, with ipsolateral temporal and contralateral nasal blindness. (_D_) =To the temporo-sphenoidal lobe.= When the tumour occupies the anterior part of the temporo-sphenoidal lobe, more especially when it is situated on the internal aspect of that lobe, the degree of _optic neuritis_ is intense. Perversion or loss of _smell_ may be noticed--a symptom of difficult determination on account of the general condition of the patient. As the result of pressure exercised on the optic tracts _hemianopia_--with hemianopic pupillary reaction (the pupil not reacting to light)--may be observed. Pupillary reactions, however, are complicated by possible paralysis of the third nerve. Some _weakness of the face muscles_ on the contralateral side is a fairly constant symptom, presumably dependent on the upward pressure exercised on the lower motor areas. A tumour involving the more posterior and central portions of the lobe may bring about a certain degree of _word-deafness_, whilst objects may be incorrectly named or named with difficulty, the patient being more or less aware of his mistakes and evidencing considerable annoyance of the same. In whatever part of the lobe the tumour be situated, certain sensory auræ may be present. Not infrequently the patient falls into the so-called ‘dream-state’. When sensory auræ are associated with crude sensations of smell and taste, with chewing or spitting movements, the tumour is probably situated on the antero-internal aspect of the lobe.