PLATE XXI, 



FIG. 155. Blood-vessels of three liver lobules of a rabbit. In the centre of each lobule is a 

 central vein ; at the periphery, the interlobular veins. X CO. 



in. 



FIG. 156. Dia-nun of the liver. Throe lobules (I., IT.. HI.) are to be seen. The bile 

 are black, the arteries red. and the veins bine. r. ., vena interlobularis ; A. duct. 

 1 ne direction of the circulation is indicated. 



