VISCERA OF AN OKAPI. 



203 



characteristic Ruminant way transversely across the front of the 

 heart. The lower (text-fig. 18, r.a.l. 2 ) is leaf-like and resembles 

 the same lobule in the Sheep or Goat, but is relatively larger. The 

 middle and lower lobes and the azygos lobe resemble very closely 

 those of the Goat. 



Text-figure 18. 



The lungs of Okajoia johnstoni, ventral aspect. 



b.I.a.l., bronchus of left apical lobe; b.r.a.l., bronchus of right apical lobe; 

 l.a., azygos lobe; La J}, left apical lobe, longitudinal process; l.a.L' 2 , 

 left apical lobe, transverse or cardiac process; l.i.l., left inferior lobe; 

 l.i.l.a., cardiac appendage of left inferior lobe ; r.a.l.' 1 , right apical lobe, 

 transverse process ; r.a.l,", right apical lobe, cardiac process ; r.i.l., right 

 inferior lobe; r.m.l., right median or cardiac lobe ; tr., trachea. 



The upper lobe of the left lung is very similar to that of the 

 Goat or Sheep, except for the greater length of its anterior 



14* 



