260 



COMPARATIVE ANATOMY. 

 T 



Ifcd 



Cd 



Aa 



r.AM.S. 



Fie. 209. ABDOMINAL VISCERA AND A HI-SACS OF A DUCK AFTER THE REMOVAL 

 OF THE VENTRAL BODY- WALL. (From an original drawing by H. Strasser.) 



T, trachea ; II, heart, enclosed within the pericardium ; rL, IL, right and left lohes 

 of liver ; hit, suspensory (falciform) ligament, ;md /<'/, /<*, right and left coronary 

 ligament of the liver ; D, intestine ; /', pedoralis major ; pa, pv, pectoral artery 

 and vein ; S, subclavius muscle ; Cd, coraeoid ; /'', furcula ; Ifcd, coraco-fureular 

 ligament ; Ly, Lg^-, lung ; r.Abd.S, l.Abd.S, right and left abdominal (posterior) 

 aii -sac; D.th.rt, the fibrous oblique septum ; ft, posterior intermediate air-sac ; 

 t, anterior intermediate air-sac ; s 1 , s 1 , partition-walls between these sacs ; 

 s, s, partition-walls between the anterior intermediate air-sacs and the unpaired 

 sub-broiiehial sac-, lying in the anterior part of the body-cavity; r, portion of 

 anterior wall of latter; p, axillary sac lying between the coraeoid, scapula, and 

 the anterior ribs, and communicating with the sub-bronchial air-sac; (', 0, 

 prebronchial sacs; *, point of entrance of the bronchi into the lung; Ap, 

 pulmonary artery ; ../' and /'</, innominate artery and vein with their branches. 



