212 
Wırsung, Fig. 14 K. In other specimens these fibres, K, originate in 
the same way but terminate by running under the common bile-duct 
and decussating there with similar fibres from the opposite side. 
Fig. 14. Macerated duodenal portion of the common bile-duet of man, All of 
the intestinal coats have been removed. x 5. 
Fig. 14 shows the muscular arrangement about the end of the 
common bile-duct and the duct of Wırsung after all fibres of the outer 
longitudinal and inner circular muscle coats have been removed. The 
common bile-duct and the duct of Wırsung have been drawn in the 
same position as they occupied in Fig. 12, but removal of the mus- 
cular coats of the intestine permits of a view of the various structures 
in profile. All the structures here shown have been described more 
or less fully under Figs. 12 and 13. 
After an examination of serial cross-sections of the duo- 
denal portion of the human common bile-duct, we have 
selected two of them 
of mm NASEN) for illustration since 
gust en they represent the 
principal points. The 
first figure, 15, 
taken near the level 
of union of the com- 
mon bile-duct with 
the duct of WIRSUNG. 
AT, Gr 
yale a ae 
AS <r The structures of 
ve interest are situated 
Se! = D 
SS = 
Fig. 15. Cross-section near the orifice of the duodenal portion of the common 
bile-duct of man. X 30, 
