28 ON THE STRUCTURE, DEVELOPMENT AND FUNCTION OF THE LIVER. 
distinct nuclei, which appear plump, and are not bile-tinged; its amorphous 
substance also is paler. A parenchymal cell, about of an inch in 
diameter, is figured. The two ducts had each a diameter of g-s^th of an 
inch. 
Fig. 6. View of a portal canal and portions of the two parietal lobules, with an ulti- 
mate duct running in the space nearer one side than the other. The duct 
is single ; no other existed in this part ; it gave off no branches, and had no 
communication (visible at least) with the lobules. The diameter of the 
portal canal was ■j'^rd of an inch, that of the duct yxoo^th of an inch. 
The specimen was taken from a dog, in whom the epithelium of the gall- 
bladder and the ducts was in the oily condition described in tlie text. The 
larger ducts had a distinct homogeneous tunic, the smaller no perceptible 
one, but consisted of groups of minute oily molecules, which formed at last 
mere streaks ; a distinct closed rounded extremity was not observed. 
Fig. 7. View of one of the glands of the large hepatic duct-trunks in the liver of a 
Dog ; it belongs to the conglomerate type : its cavities werejilled with an 
opake granulous matter containing numerous oil-drops, as well as many 
nuclei. Some of the contents are figured on the side. 
