INTESTINAL TRACT OF BIRDS. 



233 



practically identical with that of Numenius ; but the fold " a " is represented by two 

 loops, and loop " c " is partly fused with, or not separated from, the very large supra- 

 duodenal loop to which the long caeca are attached. 



GLAREOLIDJE. In Glareola ocularis (fig. 51), and G. pratincola is practically identical 

 in this matter, another very simple modification of the Numenius type is displayed. 

 The duodenum is similar ; Meckel's tract is relatively shorter, and is thrown into loops 

 " ," " b " with a small Meckel's diverticulum at its base, and a large and wide supra- 

 duodenal loop, loop " c " not being formed. The caeca are attached in the usual way to 

 the supra-duodenal loop, and the rectum is short, wide, and straight. 



Fig. 53. 



m 



/ft 



Intestinal Tract of Parra jacana. Lettering as in fig. 41. 



. In Thinocorys rumicivorus (fig. 52) a condition essentially similar to 

 that found in Glareola is displayed. The duodenum is similar ; Meckel's tract is 

 suspended at the end of an oval stretch of mesentery, and in it loop " b " with the 

 diverticulum at its base is obvious, although in the drawing it is represented as turned 

 up instead of running out in the axial line. Loops " a " and " c" are not differentiated, 

 and the supra-duodenal loop to which the long caeca are attached is not sharply 

 separated off except at its apex. The rectum is straight, wide, and of moderate length. 



(EDICNEMIDJE. In (Edicnemus scolopax, the Stone-Curlew, there is displayed a con- 

 formation closely similar to that found in Thinocorys and Glareola. The duodenum 



