TNTESTINAf, TRACT OF FilKDS. 



227 



nerve roniinf^ from a special gang-lion in tiie duodena] loop (lig. 45, r.n..r.). The peculiar 

 caeca wiiicli have becji described l)y J^eddard (2. p. ."332) are specialized not only in their 

 ^rcat length l)nt in liieir internal structure. The general character of the gut, however, 

 especially if 1 am correct in my interpretation of the small folds marked '• « " and " c,' 

 is obviously Kalline. The resemblance betAveeu the guts of 0//s and of the Tinaraus is 

 certainly striking, the only notable difference being that in the Tinamu the ciecji are 

 less specialized and that Meckel's diverticulum lies distad of the great loop of Meckel's 

 tract rather tiian actually on it. I regard tlu; closeness of the resemblauce as not 

 definitely m()r[)h()logical. 



Rui.\o(;iii;tid.k. — lu Rhinochetus jnbalua, the Kagu (lig. 46), the duodenum is 



Fig. 40. 



Intestinal Tract nf KluHucIirtns jnhatn.-:. I.ctteriiig as in fij^. 41. 



a simple, short, and narrow loop. Meckel's tract slunvs tirst a pair of minor loops, tin; 

 second of wliich is double, then an axial loop uith a large diverticulum about the middle 

 of its distal liml), then a large .simple loo]) markinl " r," then ;\ long narrow supra- 

 duodenal loop with a bridging vein. The cteca are rather short, and the rectum is 

 straight, wide, ami of moderate length. The intestinal tract of this bird certainly dilfers 

 considerably from that of other members of th(> Gruiform assemblage. The most 

 important diffi^rences are the presence of an additional loop on Meckel's tract, the 

 circumstance that the whole of that tract, with the exception of the supra-duodenal 



