300 ANIMAL PHYSIOLOGY, 
found in herbivorous animals, associated often with a,capacious 
and chambered stomach, furnishing a larger laboratory in 
Fic. 258.—The viscera of a rabbit as seen upon simply opening the cavities of the thorax and. 
abdomen without any further dissection. A, cavity of the thorax, pleural cavity on either 
side; B, diaphragm ; C, ventricles of the heart; D, auricles; E, pulmonary artery; F, . 
aorta ; G, lungs collapsed, and occupying only back part of chest ; H, lateral portions of 
pleural membranes ; J, cartilage at the end of sternum (ensiform cartilage) ; K, portion 
of the wall of body left between thorax and abdomen; a, cut ends of the ribs; L, the 
liver, in this case lying more to the left than to the right of the body ; M, the stomach, a. 
large part of the greater curvature being shown; N, duodenum ; 0, small intestine; P, 
. the czecum, so largely developed in this and other herbivorous animals; Q, the large: 
‘ intestine. (Huxley.) 
which Nature may carry on her processes. To illustrate, the 
stomach of the ruminants consists of four parts (rwmen, reticu- 
lum, omasum ( psalterium),abomasum). The food when cropped 
is immediately swallowed; so that the paunch (rumen) is a 
‘mere storehouse in which it is softened, though but little 
‘changed otherwise; and it would seem that real gastric di- 
