bo 
oe) 
Emil Goetseh. 
Jach duct is oblique in direction with reference to the axis of the 
esophagus but has a general direction downward in the direction 
of the stomach. The descending portion of the duct les in the 
tela submucosa close underneath the lamina muscularis mucose, and 
may reach a length of 4.6 mm., although the majority of them are 
much shorter. Each duet branches at its termination into from two 
to five rarely more secondary ducts, each of which enters a lobule. 
Ampullary dilatations of the ducts are of very common occurrence 
and affect most frequently the oblique portion of the main duct in 
the submucosa. Almost as frequent, however, are the dilatations 
into ampulle of the secondary ducts at the pomt of emergence from 
the lobule or in the hilum of the lobule. The portion of the duet 
contained in the lamina propria mucose is frequently surrounded, 
as pointed out by Flesch (88) and Schaffer (97), by accumulations 
of leucocytes and often by true lymphatic nodules with a germinal 
center. At the point where the duct emerges from the lobule there is 
also, frequently, surrounding the duet, an accumulation of reticular 
tissue containing large numbers of leucocytes. ‘The nature of the 
leucocytes found in these accumulations varies considerably, but in 
some cases the predominating cell is Unna’s plasma cell. In other 
eases the lymphocytes predominate. In all cases, however, there 
are large numbers of plasma cells distributed along the duct and in 
the reticular tissue forming the framework of the gland, and in those 
cases where no nodule is present along the duct one finds occasionally 
the whole duct surrounded by a narrow layer of reticular tissue 
containing plasma cells and lymphocytes. 
As regards the structure of the lobule and the character of the 
individual cells composing the gland, little can be added to the 
excellent description given of these structures by Schaffer (97) and 
the description which follows is largely confirmatory of his obser- 
vations. 
The lobular duct gives off within the hilus of the gland a series 
of intralobular duets which are arranged radially around it and are 
of variable length, those which drain the portions of the lobule near 
the hilus being short, those which go to the terminal portions of the 
lobule longer. Each of these intralobular ducts drains a pyramidal 
