436 STEUCTUEE AND CLASSIFICATION OF BIRDS- 



the primitive arrangement. The duodenal loop is curved, 

 and in other storks (s.s.) this (cf. fig. 208) is converted into a 

 spiral. There is a tendency, in fact, among the Ciconiidse 



Fig. 206.— Windpipe op Platalea ajaja (aptek Gaeeob). 



a, traoliea ; b, bilurcation of bronolii in front of sternum ; r,b, l.b, brouohl ; if, cssophagus 

 «, cervical muscles. 



