FIG. 237. ABDOMINAL VISCERA AND AIR-SACS OF A DUCK AFTER THE RE- 

 MOVAL OF THE VENTRAL BODY- WALL. (From a drawing by H. Strasser.) 



T, trachea ; H, heart, enclosed within the pericardium ; rL,lL, right and left 

 lobes of liver ; Ish, suspensory (falciform) ligament, and led, Ics, right and 

 left coronary ligament of the liver ; D, intestine ; P, pectoralis major ; pa, 

 pv, pectoral artery and vein ; S, subclavius muscle ; Cd, coracoid ; F, furcula ; 

 Ifcd, coraco-furcular ligament; Lg, Lg l , lung; r.abd.S, Labd.S, right and 

 left abdominal (posterior) air-sac ; D.th.a, 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-bronchial sac, lying in the anterior part of the 

 body-cavity; v, portion of anterior wall of latter; p, axillary sac lying 

 between the coracoid, scapula, and the anterior ribs, and communicating with 

 the sub-bronchial air- sac ; C, C, prebronchial sacs ; *, point of entrance of 

 the bronchi into the lung ; Ap, pulmonary artery ; Aa, Va, innominate artery 

 and vein with their branches. 



