1896.] 



OBLIQUB SirXA IN XHE PASSBBINBS. 

 Kg. 1. 



227 



Diagrammatic transverse section through the thoras of a Duck. 



L., L., lungs; L.L,, B.L., left and right liver-lobes; O.S., oblique septum ; 

 A.S., horizontal septum. 



Fig. 2. 



Diogrammatio transverse section through the thorax of a Crow 

 (Corvus capellanua). 



a, rudiments of sternal attachment of oblique septum. The other 

 lettering as in fig, 1. 



15* 



