Added to the above material we also had the opportunity of reviewing and studying the lesions of 18 autopsies performed by Dr. J. W. McMeans. These cases were very similar to our own series, in that they were cases of epidemic influenza amongst soldiers who were being cared for at the St. Francis Hospital. The disease processes were quite alike in the two series, and the analyses made by Dr. McMeans are comparable in our own and serve as a means of checking our results obtained in another institution. The similarity of the lesions in the lungs and other organs serve to indicate that what is reported in this paper is an index of the nature of the lesions of epidemic influenza as it occurred in the Pittsburgh district. In a few instances the autopsies performed by Dr. McMeans revealed more advanced pulmonary lesions with abscess and gangrene than were noted in the cases autopsied at the Military Hospital. The process, however, in the two series of autopsies was identical. _General External Features_ There were no external characteristics of the bodies which were autopsied by us which were constant. Some features were more commonly present than others. Of these the cyanosis of the face, head, neck and shoulders, and in a few instances of the upper extremities, attracted our attention more than any other. This cyanosis was present in over one-half of the number of cases, and it was confined almost always to the upper part of the body. The face, ears and neck were always more affected than other parts. This cyanosis bore no relation to the length of time after death when the body was viewed, as we found that when it was present during life it maintained its prominent appearance for a long time after death. The cyanosis differed from the bright hue or flush as it is at times observed in ordinary pneumonia, the color in these instances being of a dark purple, or better a purplish blue. The lips and ears showed the most intense color. The cyanosis was not associated with any evidence of œdema. The capillaries of the tissues were filled with blood which was of a very dark character. Cyanosis could also be seen in the finger tips about the nails. This was more marked in the upper extremities than in the lower. The skin of the body rarely showed any cyanosis, these tissues being quite pale, or at times showing a slightly yellowish tinge. In one instance the cyanosis of the head and neck was accompanied by a slight purplish rash upon the upper portion of the chest. This rash was of a petechial kind, there being slight hemorrhage into the tissues. The lesion, however, was not of the blotchy purpuric type which has been observed by others during this and past epidemics (Cole). This single case is the only one where we had evidence of superficial hemorrhages into the skin. TABLE III