RUMINANTIA STOMACH. 



867 



cardiac portion of the stomacli of tlie liorse. 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 towards 

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



1 I. 129 

 Stomach of an Ox iuflated— viewed from the right side. A, Rumen ; a, Left sac ; a', Its anterior , 

 extremity ; a", Left conical sac ; h, Eight sac ; b', Its anterior extremity ; h", Eight conical sac ; 

 c, SuiDsrior border of rumen ; d. Its inferior border ; e e, Longitudinal groove ; g, (Esophagus ; 

 /, Its dilated extremity entering rumen ; h, Spleen ; B, Eeticulum ; i, Its greater curvature ; k, Its 

 left extremity; I, Its right extremity; C, Psalterium ; m, Its greater curvature; n. Its lesser 

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

 curvature ; r, Its lesser curvature ; s, Its anterior extremity ; t, Its posterior extremity ; u, Pylor- 

 us ; V, 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- 



