William Snow Miller 395 
into finer ramifications. Branches also arch over dorsally from the 
facies diaphragmatica and facies mediastinalis. One or more of the 
branches which enters the incisura interlobaris extends through the 
incisura and reaches the facies costalis. 
Fic. 4. Left lung of a sheep partially distended. Two-thirds natural size. 
The lung is seen from below and somewhat from the mesial surface. F. d.= 
facies diaphragmatica. FF. m.=—facies mediastinalis. F. c.— facies costalis. 
I.i.=incisura interlobaris. L.p.—ligamentum pulmonale. JL. s.=lobus 
superior. L. i. = lobus inferior. The cut bronchus and vessels are readily 
recognized at the hilus. From the hilus and from the branch situated along 
the attached border of the ligamentum pulmonale the branches of the bron- 
chial artery (solid black lines) can be traced to their distribution on both 
lobes of the lung. 
This arrangement leaves the center of the facies costalis without any 
direct branches of the bronchial artery. The deficiency is supplied, 
however, by branches of the bronchial artery which come to the surface 
from the depths of the lung. 
