OCR Text |
Show 1892.] CLASSIFICATION OF BIRDS. 251 IV. TROGONES. Tropical. Frugivorous. 10 primaries. Oil-gland nude. No downs in adults. Schizognathous. Basipterygoid processes rudimentary. 15 cervical vertebrae. Spina externa long, forked. Coracoids touching each other. Hypotarsus complex. Flexors of type VIII. (Unique.) Intestinal convolutions of type VI. Caeca functional. 1. Troyonidce. V. CORACI^E. Cosmopolitan. Desmognathous. Basipterygoid processes absent, or (Coraciidce) sometimes rudimentary. 14 or 15 cervical vertebrae. Hypotarsus complex. Syrinx tracheo-bronchial. 1. Coraciidce. Palaeogaean. Zoophagous. Dorsal pterylosis with apterium. 10 primaries. Oil-gland nude. No downs in adults. 14 cervical vertebrae. No spina interna. Procoracoid process large, but not fusing with the acrocoracoid. Right and left carotids present. Ca3ca functional. 2. Momotidce. Neotropical. Without dorsal apterium. 10 primaries. No downs in adults. Spina interna absent. Coracoids separate. Procoracoid process very small. 15 cervical vertebrae. Right and left carotids present. 3. Alcedinidce. Zoophagous. Cosmopolitan. Without dorsal apterium. 11 primaries. Oil-gland tufted. |