Cultures show the presence of hemolytic streptococci in the blood of the heart and in three plates from the lung; B. influenzæ and S. aureus were found in the left bronchus. The bronchi have wholly or partially lost their epithelium and there is deep erosion of the walls. Cavities containing polynuclear leucocytes occur within the alveolar tissue; in some instances pus containing cavities are surrounded by alveolar tissue, but in other places it is evident, that they have had their origin in bronchi. In a short segment of the circumference the wall of the preexisting bronchus is preserved and consists of squamous epithelium, vascular connective tissue and smooth muscle. The remainder of the bronchus has disappeared and a cavity is produced. The very irregular wall of the cavity is formed by partially destroyed alveoli filled with fibrin and leucocytes. =Autopsy 387.=—C. M., white, aged twenty-one, laborer, resident of Mississippi, had been in military service twenty-one days. Illness began on September 22, nineteen days before death, and the patient was admitted to the hospital on the same day with a diagnosis of bronchitis; a diagnosis of bronchopneumonia was made on October 2, nine days before death. The leucocytes on October 3 numbered 8000 (small mononuclear, 36 per cent; large mononuclear, 5 per cent; polynuclear, 59 per cent). =Anatomic Diagnosis.=—Acute bronchopneumonia with consolidation in right upper lobe and hemorrhagic peribronchiolar consolidation in left lower lobe; abscess below pleura in left lower lobe; purulent pleurisy on both sides; edema of mediastinum; purulent bronchitis; bronchiectasis. There is advanced bronchiectasis, and bronchi with no visible cartilage are dilated to from 4 to 8 mm. in diameter; they contain purulent fluid which wells up from the cut surface. About dilated bronchi there is in places dull red or grayish red consolidation forming an encircling zone. Situated below the pleural surface within an area of consolidation at the posterior border of the left lower lobe there is a spot 3 cm. across where the tissue is yellow and has in places undergone purulent softening. Several smaller abscesses occur nearby. Cultures from the blood of the heart and from the edematous mediastinum contain hemolytic streptococci. From the abscess are grown S. albus, Pneumococcus II and B. influenzæ. The purulent contents of a small bronchus contains S. hemolyticus, B. influenzæ, S. aureus and a few pneumococci.