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Show 254 DR. H. GADOW ON THE [Mar. 15, 2. Menuridce. Australian. Hallux the strongest toe. Front toes eleuthero-dactyle. Flexors of type VII. 14 cervical vertebrae. Spina externa forked. Intestinal convolutions of type VII. Di-acro-myodous. a. Menurince. Furcula complete. Three pairs of syringeal muscles. b. Atrichiince. Clavicles rudimentary. T w o pairs of syringeal muscles, 3. Passeridce. Front toes eleutherodactyle. Hallux the strongest toe. 14 cervical vertebrae, Spina externa forked. Flexors of type VII. Intestinal convolutions of type VIII. a. P. oligomyodaj. American. Mostly mesomyodous, never di-acro-myodous. b. P. tracheophonce. Neotropical. Syrinx tracheal. c. P. polymyodce. Cosmopolitan. Di-acro-myodous. APPENDIX. List of the Characters employed in determination of the Affinities of the various Groups of Birds. A. Development. Condition of young when hatched: whether nidifugous or nidicolous j whether naked or downy, or whether passing through a downy stage. B. Integument. Structure and distribution of the first downs, and where distributed. Structure and distribution of the downs in the adult: whether absent, or present on pterylae or on apteria or on both. Lateral cervical pterylosis : whether solid or with apteria. Dorso-spinal pterylosis : whether solid or with apterium, and whether forked or not. Ventral pterylosis: extent of the median apterium. Aftershaft: whether present, rudimentary, or absent. Number of primary remiges. Cubital or secondary remiges : whether quinto- or aquinto-cubital. Oil-gland: present or absent, nude or tufted. |