Injuries of the #venous sinuses# may occur apart from gross lesions of the skull, but as a rule they accompany fractures and penetrating wounds. The transverse (lateral), superior sagittal (longitudinal), and cavernous sinuses are those most frequently damaged. On account of the low pressure in the sinuses, spontaneous arrest of extra-dural hæmorrhage usually takes place, and recovery ensues. In some cases, however, the amount of blood extravasated is sufficient to cause compression. If the dura mater is torn, and the blood passes into the sub-arachnoid space, it may spread over the whole surface of the brain. Sometimes the bleeding only commences after a depressed fracture has been elevated. In the presence of an open wound, the venous source of the bleeding is recognised by the dark colour of the blood and the continuous character of the stream. It may be arrested by pressure with gauze pads or by packing a strand of catgut into the sinus (Lister), or, if this fails, by grasping the sinus with forceps and leaving these in position for twenty-four or forty-eight hours. A small puncture in the outer wall of the sinus may be closed with sutures. Signs of increasing compression call for trephining and opening of the dura if this is necessary to admit of the clot being removed. #Intra-cranial Hæmorrhage in the Newly-Born.#--An extravasation of blood into the arachno-pial space frequently occurs during birth. The observations of Cushing seem to show that this is usually due to tearing of the delicate cerebral veins which pass from the cortex to the superior sagittal sinus, from the strain put upon them by the overlapping of the parietal bones, in the moulding of the head. It may sometimes be due to an excessive degree of asphyxia during birth. The extravasation is usually most marked over the central area of the cortex near the middle line, and it is often bilateral.