Occasionally there is irregularly distributed hemorrhage and perhaps some edema in the alveoli immediately adjacent to those which form the peribronchiolar focus of inflammation. In such instances small bronchi, that is, air passages, lined by columnar epithelium and devoid of tributary alveoli, may be surrounded by a zone of hemorrhage; immediately surrounding the bronchus, the wall of which shows intense inflammation, alveoli, in a zone of which the radius represents several alveoli, are filled with blood. This hemorrhagic zone is continued from the bronchus over the focus of inflammation which surrounds the bronchiole. Another variation in the character of the lesion is doubtless referable to variation in the severity of primary bronchial injury. Alveoli immediately surrounding small bronchi are filled with dense plugs of fibrin. The alveoli which besot the walls of the bronchioles contain fibrin, but the alveolar duct and its tributary alveoli are filled with polynuclear leucocytes. The bacteria which have been cultivated from the lung in autopsies with peribronchiolar pneumonia are as follows: Pneumococcus 5 S. hemolyticus 8 B. influenzæ, pneumococcus 5 B influenzæ, S. hemolyticus 7 B. influenzæ, staphylococcus 1 Pneumococcus, staphylococcus 2 S. hemolyticus, staphylococcus 2 B. influenzæ, pneumococcus, S. hemolyticus 2 B. influenzæ, pneumococcus, staphylococcus 1 B. influenzæ, S. hemolyticus, staphylococcus 2 Pneumococcus, S. hemolyticus, staphylococcus 3 No organism 3 —— Total 41 The following list which shows the bacteria found in the blood is an index to the pathogenicity of pneumococci and hemolytic streptococci: Pneumococcus 22 S. hemolyticus 20 Pneumococcus, S. hemolyticus 1 No organism 14 —— Total 57