Tyrannus verticalis 19 April 1957 2 1/2 mi W. Patterson Stanislaus C. Calif. Wm Lewin + his wife obtained this bird this date and froze it immediately. On (1 May 195) he gave it to me. I thawed it enough to slice it open, and put it into formalin for later dissection for Zoo/06 project. WT. 42.2 gm. Dissected the bird 9 May 1957. Cut from chi to vent, removed lung material and heart. Cut + reflected trachea. Tore away conn. tissue. The state of preservation seems not to be as good as in the other two birds. General: A small tract with a bit of fat anteriorly + posteriorly. Esophagus appears large, as does left liver lobe. Esophagus: Opens from wide pharynx. Had a dark, ridged appearance at first. This was caused by a large (33mm) caterpillar in the esoph. and possibly extending into the stomach. Preserved while stretched, the esoph. may not be as it looks. It appears thin walled and smooth inside, except for a few folds on the dorsal side, anteriorly. As it goes dorsal to the heart, it turns slightly to the left. Liver: Left lobe is much smaller than right. It is roughly triangular in shape, lying in the ventro-lateral part of the oesum. Ventrally it bends around and extends slightly over mid-line. It's overlapped here by the right lobe. The right