EXCKETGBY BILIARY PASSAGES. 



247 



Hum. If the ducts in the substance of the liver be isolated, 

 they are found covered with these little groups of follicles, 

 and have the appearance of an ordinary racemose gland, ex- 

 cept that the acini are relatively small and scattered. This 

 appearance is represented in Fig. 11. 



FIG. 11. 



Anastomoses, and racemose glands attached to the biliary ducts of the pig, magnified 

 eighteen diameters. 1. 1. Branch of an hepatic duct, with the surface almost entirely 

 covered with racemose glands opening into its cavity ; 2, Branch in which the glands 

 are smaller and less numerous ; 3, 3, 3, Branches of the duct with still simpler 

 glands: 4. 4. 4, 4. Biliary ducts with simple follicles attached; 5, 5, 5, 5, Same, with 

 6, Anastomoses in arches ; 7, 7, 7, Angular a 



fewer follicles ; 6. 6. 6, 6, 6, 



8. 8. 8. 8. Anastomoses by transverse branches. 



1857, tome iii., p. 279.) 



anastomoses : 

 (SAPPEY, Traiie tfanaLamie, Paris. 



The excretory biliary ducts, from the interlobular vessels 

 to the point of emergence of the hepatic duct, present nu- 

 merous anastomoses with each other in their course. 



Vasa Aberrantia. In the livers of old person?, and oc- 

 casionally in the adult, certain vessels are found ramifying 

 on the surface of the liver, but always opening into the 

 biliary ducts, which have been called vasa aberrantia. These 

 are never found in the foetus or in children. They are, un- 

 doubtedly, appendages of the excretory system of the liver, 

 and are analogous in their structure to the ducts, but are 



