KUMIXAXTIA STOMACH. 



367 



cardiac portion of the stomach of the horse. The rumen in the adult is 

 very large, occupying about three-fourths of the abdomen. It is situated 

 on the left side, inclining obliquely downwards from left to right, and 

 elongated from before backwards. The surface is smooth, and divided into 

 two lateral regions or hemispheres, by slight grooves, which deepen toward.* 

 the extremities. The sides are smooth, thick, and rounded ; the extremities 



FIG. 129. 



Stomach of an Ox inflated viewed from the right side. A. Ruuien ; a, Left sac; a', Its anterior 

 extremity; a", Left conical sac; 6, Bight sac; b', Its anterior extren.: . ..: conical sac; 



c, Superior border of ramen ; d. Its inferior border ; e , Longitudinal groove : g, (Esophagus ; 

 /, It= dilated extremity entering rumen ; h, Spleen ; B, Beticnlnm ; i, Its greater curvature ; I. Its 

 left extremity; I, Its right extremity; C, Psalterinm ; HI, Its greater curvature ; n. Its lesser 

 curvature ; o, Its anterior extremity ; p, Its posterior extremity ; D, Abomasnm ; q. Its greater 

 curvature ; r, Its lesser curvature ; *, Its anterior extremity ; t, Its posterior extremity ; 

 u; : r, Duodenum. 



are divided by a deep fissure into two lobes, the anterior being concealed. 

 These two fissures, continued by the grooves, divide the rumen into a right and 

 left sac, which is most manifest in the anterior. The right sac is the shortest, 

 being covered in the major part by the peritoneal omentum : the left is pro- 

 longed beyond, and at either extremity curved on the right, receiving super- 



