THE CGELOM 



39 



thence diverging to be attached ventrally to the sternum 

 along two lines, one on each side, set obliquely to the median 



^ v.aX. m 



Fig. 23. — Eespieatoey Organs of Duck. 



/-I-',air sacs; TV, trachea ; d.Z, dorsal margin ; v.a.^, ventral marginof lungs; l-3,clissepiments 

 between air sacs; Ao, aorta; c.a, coeliac artery; m.a, mesenteric :wi, muscular fibres ono.j, 

 oblique septum ; VJi, vertical median septum ; L.c, longus colli ; K, kidney. (After Huxley.) 



.K. 



Fig. 24.— Bespiiiatoey Oegans of Aptektx. Lbtteeing as in Fig. 23 

 (aftee Huxley 



