DIGESTIVE TRACT OF THE CAT. 



29 



ing was made of the superficial intestinal coils, and then a 

 tracing of this drawing. The coils were followed through- 

 out the entire length of the jejunum and ileum, and the 

 deeper ones sketched in beneath the already traced superfi- 

 cial coils. So that there were two drawings for each animal, 

 one of the superficial coils, the other of the superficial and 

 deep ones. 



On comparing the drawings thus made of the five cats, 

 it was impossible to discover the slightest resemblance be- 

 tween them. 



I therefore conclude that there is no fixed relation of the 

 individual coils of the jejunum and ileum in the adult cat, 

 and consequently that no constant arrangement exists in 

 the position of these divisions of the small intestine. The 

 intestinal coils were, of course, much more complicated in 

 the adult animals than in the embryos, which is presumably 

 due to the greater length of the adult intestine. 



The Liver. 



The development of this organ has an important in- 

 fluence on the adult position of certain divisions of the 

 alimentary canal. 



The cat's liver differs in so many respects from the 

 human liver that a brief description of its lobes may be 

 useful, before we consider the effect of its growth upon the 

 neighboring organs. 



If a liver which has been previously hardened in situ 

 is removed from the body and viewed by its ventral surface, 

 it will be seen to present a dome-like form. 



The summit of the dome corresponds to its cephalic 

 surface and is in connection with the highest part of the 

 diaphragm. Its base represents the caudal surface, and is in 

 relation with the different viscera. The longitudinal fissure 

 divides the organ into two unequal halves. The right half 

 is distinctly the larger of the two. An oblique fissure sub- 

 divides the left half of the liver into the so-called left central 



