CONGENITAL HKART DISEASE. 



Ascending aorta. 



Posterior fleshy 

 element of septal 

 wall of infun- 

 dibulum. 



Dotted outline 

 indicating the 

 position of 

 aortic cusps on 

 other side of 

 septum. 

 Undefended 

 space or pars 

 membranacea 

 septi. 



Tiicuspid valve. ' '- 



Pulmonary 

 artery. 



Pulmonary 

 cusps. 



Anterior fleshy 

 element of 

 septal wall of 

 infundibulum. 



Wall of right 

 ventricle. 



FiG. 34. To show the elements which constitute the aortic septum or septal wall of the 

 infundibular portion of the right ventricle, and the position of the pars membranacea 

 septi or undefended space. 



[To face page 263. 



