In 6 instances there has been frank pneumonic consolidation limited to a zone encircling small and medium-sized bronchi which have often been obviously dilated. On cross section these patches of pneumonia are circular, from 1 to 2 cm. in diameter and each contains a bronchus at its center. When the bronchus is cut longitudinally it is evident that pneumonic consolidation forms a cylindrical sheath about the tube. The consolidation varies in color from red to grayish red. In one instance (Autopsy 253) the consolidated tissue has formed a gray zone in contact with the bronchus and is red in a peripheral zone; microscopic examination shows that the alveoli about the bronchus contain fibrin, whereas those at a greater distance contain red blood corpuscles. In this instance, the associated pneumonia in another part of the lung has been somewhat anomalous and has had characters both of lobar and bronchopneumonia, for scattered in the left lung there have been patches of firm consolidation not more than 2 cm. across. The smaller of these patches are deep red, but the larger are coarsely granular and gray in the center. The patchy character of the lesion has suggested bronchopneumonia, but the coarse granulation on section and the presence of fibrinous plugs within the small bronchi have presented a close resemblance to lobar pneumonia. This autopsy is one of the few instances in which Pneumococcus II has been found, Pneumococcus II being present in blood and lungs, B. influenzæ, in lungs and bronchi. In 2 additional instances (Autopsies 374 and 392) peribronchial pneumonia, recognizable at autopsy, has been associated with consolidation having the characters of lobar pneumonia. In one instance, Autopsy 374, the right lung has contained two patches of firm, mottled red and pinkish red coarsely granular consolidation each about 6 cm. across, one situated in the upper lobe and the other in the lower lobe. Elsewhere in the lung, in definite relation to dilated bronchi, occur patches of firm, red, coarsely granular consolidation from 1 to 1.5 cm. in diameter when cut transversely. The bronchus in the center has contained purulent fluid. In the opposite lung similar consolidation has been limited to zones about dilated bronchi which contain purulent fluid. Pneumococcus IV has been obtained from the blood of the heart. The peribronchial pneumonia which has been described occurs in association with evidence of profound injury to the bronchial wall. In 5 of 6 instances purulent bronchitis has been found at autopsy; in half of these instances bronchiectasis has been noted. The epithelium of the bronchus has been found separated from the underlying tissue by serous exudate, blood and leucocytes; epithelial cells undergo necrosis and disappear, the denuded surface being covered by fibrin. Necrosis extends a varying depth into the wall of the bronchus; blood vessels are engorged, and there is in some instances hemorrhage throughout the wall of the bronchus.