PLATE XVI 



Plate XVI is from the upper surface of a section 

 through the lowermost portion of the twelfth thoracic ver- 

 tebra posteriorly and the costal cartilages of the eighth ribs 

 anteriorly. The section is 2.5 cm. anteriorly and 2 cm. pos- 

 teriorly below the plane of the last section. The posterior 

 margin is .2 cm. lower than the anterior. 



The common bile duct (56) lies external to the portal 

 vein and the hepatic artery. The cystic duct (55) is cut 

 at its origin at the neck of the gall bladder (Collum vesi- 

 cae felleae). The cystic and hepatic ducts unite in the 

 lower part of the section above to form the. common bile 

 duct. The sections of the intestine are numbered con- 

 secutively, as they would be encountered in passing down 

 the alimentary canal. The letter is the initial letter of 

 the name of the part and the subscript denotes the num- 

 ber of the serial section. The letter I has been used to 

 denote jejunum as well as ileum. 



104 



