76 



MR. F. E. BEBDAKD ON THE 



diiferentiated from the much longer coiled region. Now, in 

 Pluvifinus the distal portion of the jejuno-ileum can be cle rigeur 

 divided off fi-om the point lettered a in the figure (text-fig. 24), 

 after which point the intestine exhibits no resting in loose folds, 

 but passes in a broad curve to the point where it is attached 

 by a ligament to the duodenum. We have, in fact, here the 

 commencing separation from the jejunal region of a very wide 

 ileic loop. There is, in fact, a close similarity with the gut 

 of Melanerpes *. A slight alteration in the gut of both of these 



Text fiff. 25. 



Intestinal tract of CEdicnemus scolopax. 

 Letterincj as before. 



birds leads to that of many Picopasseres, where the ileic* loop is 

 more definitely marked oif from the jejunal but remains very 

 broad. From this type, moreover, can be readily deduced the 

 plan of intestinal coiling which is found in some other Limi- 

 colous birds which I have examined. One of the simplest of these 

 is Sarciopho7-us pectoralis, in which the ileic loop is attached to 

 the duodenal for nearly its whole length by the usual ligament 

 and is also a wide loop. The jejunal has no fixed loops, but lies 



* Vide p. 62. 



