474 



MAMMALIA. 



<lividecl into a number of polygonal spaces on its walls ; it is 

 small ill capacity, and acts especially as a reservoir for licpiids. 

 The omasum receives the "cud." This division has its walls 

 thrown up into a number of deep folds longitudinally disposed, 

 and placed so close together that they resemble th(_- leaves of a 

 book : we can recognise three series of them of different sizes. 

 The food, after being crushed between the leaves, is passed 

 through this into the fourth division, 1lie aliomasum or true 

 digestive sto)naeh. lli.'re the food is subjected to the action 



7i', Ruiiirii ; r/, (tsuidiayn.s ; (ir.i;, u-sojiliage^l 

 Al', aljoiiiasiiiii ; 7), cluodcnuiu ; r, conslnction. 



MAC'H OF RtTMINANT. 



utne : Re^ reticulum ; 0, oma.suni ; 



of the gastric juice, and undergoes the chief digestion. It is 

 called the rennet stomach because of a substance formed by the 

 secretion of the peptic cells going by that name, the rennet used 

 in chcesemaking and in "junkets" being obtained from the 

 salted stomachs of calves. One must look upon the first three 

 chambers of the ruminant stomach as being dilatations of the 

 a?sophagus only. As much as sixty gallons of licpiid can be 

 stored in the stomach of an dx ! The intestinal canal is very 

 long. The small intestine in the ox is twice the length of that 

 of the horse, but is smaller in diameter ( = 49 yards). The 



