339 



r.AHJS. 



FlG. 334. Air sacs of duck, from Wiedersheim. Aa, anonymous, Ap, pulmonary 

 artery ; C, cervical sac ; Cd, coracoid ; D, intestine ; Dtha, diaphragm ; F, furcula ; 

 H, heart ; lAbdS, left abdominal sac ; led, Ics, ligamentum coronarium hepatis ; Lg y 

 lung ; Ifcd, lig. coraco-f urcularis ; IL, liver ; Ish, suspensor of liver ; M, stomach ; Oe , 

 oesophagus ; P, pectoralis ; /, pectoral sac ; pa, artery to, pv, vein from, pectoralis ; 

 ;/,, liver ; rAbdS, right abdominal sac; S, subclavian ; s, partition between the ante- 

 rior diaphragmatic and the supracoracoid sac ; s 1 , between anterior and posterior dia- 

 phragmatic sacs ; T, trachea ; z>, anterior wall of supracoracoid sac ; Va, anonymous 

 vein ; *, entrance of bronchi into lung ; t, anterior, tt, posterior diaphragramatic sac. 



