MULLERl 



THE AIR-SACS OF THE PIGEON 



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DIA Diaphragma abdominalis. Fig. I. 



DIP Diaphragma pulmonalis. Fig. 1. 



DOETR Diverticulum oesophageo-tracheale. Figs. 7 and 11. 



DSC Diverticulum subcordale. Fig. 2. 



DSH Diverticulum suprahumerale. Fig. 12. 



DSOE Diverticulum suboesophageale. Fig. 1. 



DSPM 1 Diverticulum supramedullare (not in contact with that of the 



opposite side). Fig. 12. 



DSPM 2 Diverticulum supramedullare (in contact with that of the opposite 



side). Figs. 11 and 12. 



DSPOE Diverticulum supra-cesophageale. Fig. 1. 



DSPV Diverticulum supravertebrale. Figs. 3, 4, 5, 7, II, and 12. 



DSSC 1 Diverticulum subscapulare, first portion. Figs. 7, 11, and 12. 



DSSC 2 Diverticulum subscapulare, ventral outgrowth. Fig. 11. 



DSSC 3 Diverticulum subscapulare, principal cavity. Figs. 2, 11, and 12. 



DSSC 4 Diverticulum subscapulare, dorsal portion. Fig. 7. 



DST' Diverticulum sternale. Figs. 2 and 11. 



ECT Ectobronchium primum ad septimum. Fig. 10. 



ENT 1 Entobronchium primum. Fig. 10. 



ENT 4 Entobronchium quartum. Fig. 10. 



F Furcula. Fig. 7. 



FT Foramen transversarii. Figs. 3, 4, and 7. 



FTR Foramen triosseum. Fig. 7. 



H Liver. Fig. 1. 



L Larynx. Fig. 12. 



M Mesobronchium. Figs. 1, 8, and 10. 



ME Medulla spinalis. Figs. 3, 4, 5, and 7. 



MEA Canalis supramedullaris, anterior portion. Figs. 3, 4, 5, 7, and 12. 



MEP Canalis supramedullaris, Posterior portion. Figs. 1, 2, and 12. 



MF Furcular membrane. Fig. 7. 



MLC Musculus levator coccygis. Fig. 6. 



MP Musculi Perraulti. Fig. 8. 



OC Ostium cervicale. Figs. 9, 10, and 12. 



OCD Os coracoideum. Fig. 7. 



OCL Ostium claviculare. Figs. 9 and 12. 



OE CEsophagus. Figs. 1, 2, 7, and 9. 



01 Os ischii. Fig. 6. 



OIA Ostium intermedium anterius. Figs. 9 and 12. 



OIP Ostium intermedium posterius. Figs. 8, 9, 10, and 12. 



01 PB Bronchial branch leading to the ostium intermedium posterius. 



Fig. 1. 



OP Ostium posterius. Figs. 8, 9, 10, and 12. 



OS Os sacrum. Fig. 6. 



OSC Scapula. Figs. 1 and 2. 



P Lung. Figs. 1, 2, 11, and 12. 



PAR Parabronchium. Fig. 10. 



PAV Processus articularis vertebrae. Fig. 7. 



PL Pleura. Fig. 9. 



PU Processus uncinatus. Fig. 1. 



R Kidney. Fig. 8. 



S Syrinx. Fig. 12. 



