240 DR. H. GADOW ON THE [Mar. 15, 



Tracheo-bronchial muscles attached to 7th or 5th bronchial 



rings. 

 Tongue mostly rudimentary. 



I. TUBINARES. 



10. ARDEIFORMES. 



Cosmopolitan. Aquatic. 



Young passing through a downy stage. 



Oil-gland tutted. Aquinto-cubital. Humero-coracoid 



deep. No ectepicondylar process. 

 Desmognathous. No basipterygoid process. 



I. Steganopodes. 



Cosmopolitan. Aquatic. Nidicolous. Piscivorous. 

 Rhamphotheca compound. Nares impervious. 

 No supraorbital glands. Angulare truncated. 

 Neck without apteria. 

 Legs short; all the four toes webbed together. 



{Unique.) 

 Hypotarsus complex. Flexors type of II. 

 Orthocoelous, type II. Tongue rudimentary. 



1. Phaetontidce. 



15 cervical vertebrae. 

 Procoracoid process large. 

 Garrod's symbol AXY-|-. 



2. Phalacrocoracidce. (including Sulinse, Plotinse, Pha- 



lacrocoracinas.) 



18-20 cervical vertebrae. 

 Garrod's symbol AX + . 



3. Pelecanidce. 



17 cervical vertebrae. 

 Procoracoid process small 

 Garrod's symbol A — . 



4. FregatidcE. 



15 cervical vertebrae. 

 Procoracoid process small. 

 Garrod's symbol A-f-. 



II. Herodii. 



Cosmopolitan. Waders. Nidicolous. Zoophagous. 

 Bill long, pointed, laterally compressed, with simple 



rhamphotheca. Nares pervious. 

 No supraorbital glands. 

 Neck long, with long apteria. Downs of adults 



only upon the apteria. {Unique among Ardei- 



formes.) 



