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| 1. | Digestive Organs of Pelecanus Americanus, | One-third size, | 99 |
| 2. | Sternum of Pelecanus Americanus, | Rather less than half size, | 102 |
| 3. | Stomach and proventriculus of Plotus Anhinga, | Full size, | 159 |
| 4. | Trachea and stomach of Platalea Ajaja, | Half size, | 197 |
| 5. | Stomach and proventriculus of Rhynchops nigra, | Full size, | 211 |
| 6. | Stomach, proventriculus, and intestine of Sula alba, | One-third size, | 239 |
| 7. | Stomach and œsophagus of Ardea virescens, | Full size, | 279 |
| 8. | Stomach and proventriculus of Charadrius helveticus, | ... | 285 |
| 9. | Stomach and proventriculus of Scolopax noveboracensis, | ... | 289 |
| 10. | Digestive organs of Ardea minor, | ... | 301 |
| 11. | Digestive organs of Uria Alle, | ... | 307 |
| 12. | Stomach and proventriculus of Uria Alle opened, | ... | 307 |
| 13. | Cloaca and cœca of Uria Alle, | ... | 307 |
| 14. | Digestive organs of Thalassidroma pelagica, | ... | 314 |
| 15. | Stomach, proventriculus, and duodenum of Thalassidroma pelagica, | ... | 314 |
| 16. | Stomach and intestines of Thalassidroma pelagica, | ... | 314 |
| 17. | Digestive organs and inferior larynx of Anas americana, | ... | 343 |
| 18. | Digestive organs and part of trachea of Anas strepera, | ... | 358 |
| 19. | Digestive organs of Parus atricapillus, | ... | 381 |
| 20. | Digestive Organs of Tanagra rubra, | ... | 393 |
| 21. | Digestive Organs of Falco cyaneus, | Half size, | 407 |
| 22. | Digestive Organs of Pyrrhula Enucleator, | Full size, | 420 |
| 23. | Another view of the same, | ... | 420 |
| 24. | Digestive Organs of Muscicapa verticalis, | ... | 425 |
| 25. | Digestive Organs of Troglodytes hyemalis, | ... | 442 |
| 26. | Digestive Organs of Loxia leucoptera, | ... | 471 |
| 27. | Digestive Organs of Falco islandicus, | ... | 478 |
| 28. | Digestive Organs of Falco fuscus, | ... | 529 |
| 29. | Digestive organs of Aramus scolopaceus, | Full size, | 549 |
| 30. | Digestive organs of Strix funerea, | ... | 554 |
| 31. | Cœca and cloaca of Strix funerea, | ... | 554 |
| 32. | Aperture of ear of Strix funerea, | ... | 554 |
| 33. | External ear of Strix Otus, | ... | 578 |
| 34. | Cœca and cloaca of Strix Otus, | ... | 578 |
| 35. | Digestive organs of Emberiza americana, | ... | 583 |
| 36. | Tail of Hirundo riparia, | ... | 595 |
| 37. | Tail of Hirundo serripennis, | ... | 595 |
| 38. | Part of outer primary of Hirundo serripennis, | ... | 595 |
| 39. | Cœcum and cloaca of Ardea Egretta, | ... | 606 |
