AND ABDOMINAL VISCERA. 21 



splenic omentum. It is wider at the upper end ; the 

 blood-vessels enter it along the line of attachment of 

 the omentum. 



8. The Liver. The anterior surface is convex, and 

 fits against the arched diaphragm to which it is at- 

 tached by a median fold of peritoneum, the suspen- 

 sory ligament. The organ is relatively large in the 

 dog, and, as in other mammals, may be divided into 

 two principal lobes, the right and the left. Each of 

 these is again subdivided into smaller lobes, the left 

 into two and the right into four, the homologies of 

 v^^hich are not properly known. They may be named 

 as follows : 



a. The Left Central Lobe lies against the left 

 half of the diaphragm. 



b. The Left Lateral Lobe, the largest lobe of 

 the liver, lies between the left central and the cardiac 

 end of the stomach. 



c. The Right Central Lobe Hes against the right 

 half of the diaphragm ; it has a deep groove on its 

 under surface for the reception of the gall-bladder. 



d. The Right Lateral Lobe is just posterior to 

 the right central. 



e. The Caudate Lobe, posterior to the last, lies to 

 the right of and dorsal to the pyloric end of the stom- 

 ach, extending backward to the right kidney. 



f. The Spigelian Lobe, the smallest lobe of the 

 liver, projects into the small curvature of the stomach ; 

 it lies dorsal to a fold of the peritoneum connect- 

 ing the liver to the stomach, the hepa to-gastric 

 omentum. 



g. The Gall-bladder is a large, thin-walled oval 

 sac imbedded in the right central lobe. 



h. The Bile-duct has the arrangement shown in 



