THE RUMINANT STOMACH. 



323 



lum communicates by a narrow aperture with the first sub- 

 division of the jDjloric moiety, which is somewhat more elon- 

 gated in form. The mucous membrane of this subdivision is 

 produced into a vast number of longitudinal folds of various 

 heights, but the majority of them are sufficiently large to ex- 



A. 



Fig. 102. — A, the stomach of a Sheep. B, that of a Musk-deer (Tragulus). oe., oesophagus; 

 Ji7i., rumen ; Jiet., reticulum ; Fs., psalterium ; A., Ab., abomasom ; J)u., duo- 

 denum ; Fy., pylorus 



tend almost completely across the cavity of the chamber; 

 they thus reduce that cavity to a series of narrow radiating 

 clefts interposed between the lamellae. When this portion of 

 the stomach is slit open, longitudinally, the lamellce fall apart 

 like the leaves of a book, whence it has received the fanciful 

 name of the JPsaltei^ium from anatomists, while butchers give 

 it that of McmypUes. The fourth segment of the stomach, or 

 second subdivision of the pyloric moiety, is termed the Aho' 



