In the _stomach_ and _intestines_ the lesions were of two kinds, (1) hemorrhage and (2) erosions. Petechial hemorrhages were present in the stomach 15 times, in the intestines 4 times. These small dots of blood extravasation, lying in the mucosa and submucosa, differ in no way from those observed in other acute infections and intoxications, save that the tendency for the leakage of blood into the lumen of the viscera was more pronounced. Often we could observe the presence of free and more or less altered blood in the stomach and intestines, and in 12 cases the amount was considerable, sufficient to be spoken of as melena. It is probable that the oozing of blood takes place not only from the areas visible to the eye as petechial hemorrhages, but also from the more normal-looking mucosa of stomach and bowel. The tendency to hemorrhage was not necessarily accompanied by visible alterations in the epithelial layer of the mucosa, though at times erosions were found. When hemorrhage could be observed, the extravasation of blood occupied the superficial layers of stroma, causing a separation of the tissues beneath the epithelial layer. At times the submucosa was also infiltrated, and in one instance the musculature. The lesions were isolated and sporadic, but always about small capillary loops. It appeared to us that the damage was primarily upon the vascular tissues and particularly upon the endothelial walls of the fine channels. Inflammation was not present, and the hemorrhage was more or less passive—that is, a slow oozing rather than acute hemorrhage by rhexis. The second type of lesion of the gastro-intestinal canal was erosion. This was of the nature of a defect in the mucosa, usually multiple, small and well circumscribed. The tissue loss was superficial. In their appearance these lesions were similar to those encountered in these parts in other infections, and also as described by McMeans in experimental infections of animals. The erosions appear to arise in a process of bland necrosis, limited in the periphery by healthy tissue and not tending to enlarge. It is probable that these erosions are associated in their development with the petechial hemorrhages, being a sequel to the vascular disturbance of the mucosa and subsequent digestion of the injured tissue. Multiple lesions of the stomach were found 10 times and twice in the intestine. The largest was 1.25 cm. in diameter. They are more common on the posterior than anterior wall, and usually toward the lesser curvature. It is probable that these defects are limited in their progress and heal readily.