Intestinal Tract of Corvus capellanus ; type of long-gutted Passerine. 



.<, bridging factor of duodenal vein from S.D.F. the supra-duodenal loop ; m, position of Meckel's diverticulum 

 at the apex of the spiral ; ,.., d.g., v.n.r/., ganglia of the antonomic nerve-chain. 



Fig. 73. 



-A-XT 



S.D.F. 



Intestinal Tract of Cyclorhis albiventris ; type of short-gutted Passerine. 



d, apex of duodenum, which in the unfolded condition is applied to p, the apex of the supra-duodenal loop ; 

 m, position of MeckePs diverticulum, corresponding to apex of spiral in fig. 72. 



38* 



