PLATE 21
| AVES | |
| Yucatan Horned Owl (Bubo virginianus mayensis) | |
| 1. | Owl in flight, Stucco ornament, Palenque, Palace, House E(Maudslay, IV, Pl. 43). |
| 2. | Stone carving of owl, Yaxchilan, Stela 4 (Peabody Museum Memoirs,II, Pl. 70). |
| 3. | Owl in flight, carved in wood, Tikal, House C, lintel (Maudslay,III, Pl. 78). |
PLATE 22
| AVES | |
| Yucatan Horned Owl (Bubo virginianus mayensis) | |
| 1. | Bologna 7. |
| 2. | As a head-dress, Tro-Cortesianus 95c. |
| 3. | Borgia 7. |
| 4. | On end of staff carried by warrior, Chichen Itza, Temple of theTigers, Lower Chamber (Maudslay, III, Pl. 49). |
| 5. | Aubin 13. |
| 6. | Head highly conventionalized, Palenque, Temple of the Sun(Maudslay, IV, Pl. 88). |
| 7. | Screech-owl (chiquàtli), Aubin. |