398 DR. LIONEL BEALE ON THE ARRANGEMENT OF THE BILIARY DUCTS. 
lobule of pig’s liver: injected with Prussian blue. The injection has 
entered tlie superficial portion of the cell-containing network, producing 
the mottled appearance represented. 
Fig. 23. A portion of cell-containing network near the surface of a lobule from the 
pig’s liver, injected and isolated. The injection has pressed the cells to- 
wards one side of the tube, and partially separated them from each other, 
and has thus prevented the thin wall of the tube from being in close con- 
tact with them. 
Fig. 24. Part of cell-containing network (pig), showing liver-cells, granular matter 
and oil-globules in the interior of the tube. In one part the tube is some- 
what dilated. 
Fig. 25. Most superficial portion of the cell-containing network (pig), lying partly 
in the fibrous capsule of the lobule, and partly within the capsule. The 
tubes contain a few small cells, free oil-globules and granular matter. 
Partially injected. 
Fig. 26. Portion of cell- containing network within the capsule of the lobule, injected 
with Prussian blue. Pig. 
Fig. 27 . A small portion of fig. 25 distended with injection. 
Fig. 28. Connexion of duct with cell-containing network from a fatty liver of the pig : 
injected. The small trunk a gives off several smaller branches, &, not more 
than of an inch in diameter, although distended by the injection 
which has reached the cell-containing network. The tubes of the latter 
are four or five times wider than the smallest ducts. 
Fig. 29. Part of cell-containing network and finest ducts of chick on the 15th day 
of incubation, from a preparation which had been hardened in alcohol 
and soda. 
Fig. 30. A similar preparation on the 21st day. The tubes contain much oil. 
Fig. 31. Branches of duct of newt {Triton cristatus). At a the commencement of 
the tubes of the cell-containing network. 
Fig. 32. Ducts and their connexion with the cell- containing network. Sturgeon. 
Injected. 
Fig. 33. 'DoqX,^ Lophius piscatorius \ injected. Natural size. 
Figs. 34, 35. Finest ducts of Lophius and their connexion with cell-containing net- 
work ; injected. 
Fig. 36. Part of cell-containing network. Lophius. 
Fig. 37 . A similar preparation with branches of capillary vessels, a. 
Fig. 38. Portion of a large duct (Lophius), with a branch, showing epithelium in the 
interior, an internal coat composed of circular muscular fibres, and an 
external thicker coat consisting of longitudinal fibres. 
