It will be, of course, appreciated that the coarse brain lesions under the third heading differed in localisation and in extent alone, and in no wise in nature, from those observed in the two preceding classes. The damage consisted in direct superficial laceration and contusion, and beyond the limits of the area of actual destruction, abundant parenchymatous haemorrhages more or less broke up the structure of the brain, such haemorrhages decreasing both in size and number as macroscopically uninjured tissue was reached. No opportunity was ever afforded of examining a simple wound track in a case in which no obvious cerebral symptoms had been present. IV. _Fractures of the base._--In addition to the above classes, a few words ought to be added regarding the gunshot fractures of the base of the skull. These possessed some striking peculiarities; first in the fact that they might occur in any position, and hence differed from the typically coursing 'bursting' fractures we are accustomed to in civil life as the consequence of blows and falls, and consequently were often present without any of the classical symptoms by which we are accustomed to locate such fissures. Secondly, the peculiar form was not uncommon in which extensive mischief was produced from within by direct contact of a passing bullet. As far as could be judged from clinical symptoms, indirect fractures of the base such as we are accustomed to meet in civil practice in connection with fractures of the vault were decidedly rare, and, as has already been mentioned, ocular evidence of extensive fissures extending from perforating wounds of the vertex was wanting, except in the extreme cases classed under heading I. For these reasons I am inclined to regard them as uncommon. Direct fractures of the base, on the other hand, were of common occurrence, especially in the anterior fossa of the skull. These might be produced either from within, the most characteristic form of gunshot injury, or from without. The fractures from within were often simple punctures of the roof of the orbit or nose. Punctured fractures of the roof of the orbit caused little trouble as far as the cranium was concerned, but the orbital structures often suffered severely. I saw one or two very severe comminutions of the roof of the orbit caused by bullets which had crossed the interior of the skull; in one case the whole roof was in small fragments, while the damage in others was not greater than chipping off some portion of the lesser wing of the sphenoid. The roof of the orbit again was sometimes very severely damaged by bullets which first traversed that cavity itself; thus in one case which recovered, the bullet passed transversely, smashing both globes, and fracturing the roof of both orbits and the cribriform plate so severely as to lacerate both dura-mater and brain, portions of the latter being found in the orbit on removal of the damaged eyes.