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



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



at the apex of the spiral ; ii.s., it.g., v.n.i/., ganglia of the antonomic nerve-chain. 



FiR. 7X 



-/--Xl 



Intestinal Tract of Cydorliis albiventris ; tyi)o of short-gutted Passerine. 



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



)/(, position of Meckers diverticulum, corresponding to apex of spiral in fig. 7-. 



38* 



