PLATE 3 



EXPLAXATIOX OF FlfiVRES 



5 Hi'iirt Xo. liC). All inner view of the eonus showing the termiiiation of the 

 network. A.C, R.I\(\. and L.l'.C, anterior, right posterior and left ])osterior 

 cusps of tlie i)uhiioiiarv semilunar valve. T.A'., terminal network at the hase 

 of the pulnionarv oriHce ending in a eomparatively straight line. .1/., myo- 

 cardium. 



(5 Entrance of the left crus into the left ventricle. The left erus has been 

 dissected out of the sub-endocardial connective tissue and the e])ifascicvUar 

 sheath so that only the fasciculi and their perifascicular sheaths are exjjosed. 

 F., a fasciculus dissected away on either side of the left crus for a distance of one 

 and a half centimeters. R.(\, right coronary artery. .1/., myocardium. E. 

 reflected endocardium . 



7 Different characteristics jircsentcd in the branching of the terminal net- 

 work of the N.r.N. ('. finer network found in nearly all parts. D, coarser net- 

 work found around the i)orders of the atrio-ventricular orifices. B, scroll-like 

 form found around the ])apillarv muscle. .1, coarsc^st network and irregular 

 branching found iiriiici))ally on the right septal wall. 



172 



