339 



r.AM.JS. 



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

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

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

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

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

 rL, 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 ; v, anterior wall of supracoracoid sac ; Va, anonymous 

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



