1. Head-dress with crest feathers shown as knobs, Dresden 7c. 2. Head-dress, Dresden 13b. 3. Same, Dresden 16c. 4. Tro-Cortesianus 100b. 5. Tro-Cortesianus 70a. 6. Head-dress, Tro-Cortesianus 94c. 7. Nuttall 33. 8. Conventionalized tail as a head ornament, Dresden 20c. 9. Vaticanus 3773, 17. 10. Glyph, Palenque, Temple of the Sun (Maudslay, IV, Pl. 89, gl. O, 9). 11. Trogon descending on a sacrifice, Bologna 8. 12. Tro-Cortesianus 36b. 13. Glyph, Copan (Maudslay, I, Pl. 111, gl. 54). 14. Glyph apparently representing a trogon's head, Dresden 20c. 15. Same, Dresden 9b. 16. Same, Dresden 3a. 17. Head, Nuttall 43. 18. Tro-Cortesianus 26c. 19. Figure with head ornament resembling a trogon glyph, Dresden 20c. [Illustration: PLATE 24] PLATE 25 AVES BLUE MACAW (_Ara militaris_) 1. Figure with macaw head and holding firebrands, Dresden 40b. 2. Head-dress, Dresden 16c. 3. Tro-Cortesianus 12a. 4. Glyph, Copan, Stela 11 (Maudslay, I, Pl. 112, gl. 12). 5. Same, Copan, Stela B (Maudslay, I, Pl. 38). 6. Glyph used in connection with fig. 1. 7. Glyph. 8. Stone carving of upper mandible and head, Copan, Stela B (Maudslay, I, Pl. 37). 9. Head, probably of a turtle, month sign _Kayab_, Quirigua, Stela A (Maudslay, II, Pl. 7, gl. 14). 10. Head, probably of a macaw, Copan, Altar Q (Maudslay, I, Pl. 93). 11. Tro-Cortesianus 37b. 12. Head, probably of a macaw, Copan, Stela A (Maudslay, I, Pl. 30, gl. 19). 13. Tro-Cortesianus 94c. [Illustration: PLATE 25] PLATE 26 AVES PARROTS, TURKEYS 1. Macaw as a head-dress, Tro-Cortesianus 26c. 2. Bird of sacrifice, doubtless an Ocellated Turkey (_Agriocharis_) Dresden 25c. (Compare also Dresden 26c[TN-27] 27c, 28c.) 3. Head-dress, probably a macaw, Copan, Altar Q (Maudslay, I, Pl. 92). 4. Possibly a parrot (_Amazona_), Nuttall 4. 5. Head-dress, head of a macaw, Tro-Cortesianus 89a. 6. Head-dress, possibly representing a parrot, Dresden 12b. 7. Possibly a parrot (_Amazona_), Nuttall 71. 8. Glyph representing a macaw's head, Tikal, Temple C (Maudslay, III, Pl. 78). 9. Parrot-like head-dress, Dresden 19a. 10. Possibly a macaw, Tro-Cortesianus 37b. 11. Parrot-like head-dress, Dresden 11b. 12. Bird of sacrifice, probably an Ocellated Turkey or a Chachalaca, Nuttall 22. 13. Parrot-like head-dress, Dresden 11a. 14. Head of Ocellated Turkey or a Chachalaca, Nuttall 5. [Illustration: PLATE 26] PLATE 27 AVES MISCELLANEOUS 1. Bird of sacrifice, an Ocellated Turkey or a Chachalaca, Nuttall 2. 2. Same, Nuttall 16. 3. Same, Nuttall 19. 4. Same, Nuttall 1. 5. Woodpecker possibly _Campephilus imperialis_, Nuttall 74. 6. Same, Nuttall 71. 7. Possibly a Raven (_Corvus corax sinuatus_), Nuttall 48. 8. Parrot (_cocho_), Aubin 11. 9. Same, Aubin 13. 10. Turkey-cock (_uexolot_),[TN-28] Aubin 11. 11. Same, Aubin 13.