436 STEUCTUEE AND CLASSIFICATION OF BIEDS 



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 Cicomidae 



FIG. 206. WINDPIPE OF Platalea ajaja (AFTER GAREOD). 



11, trachea ; l>, bifurcation of bronchi iu front of sternum ; r.b, l.b, bronchi ; d, oesophagus 



e, cervical muscles. 



