PLATE 4 



EXPLANATION' OF FIGURES 



S False tondoii from the left ventriele of the sheep heart. /. injected mass 

 F, fasciculus of the .S.F.<S'. E, endocardium. (\ coniieetive tissue. Delafield's 

 Haematoxylin and fuchsin stain. 



9 Cross-section false tendon from left ventricle of ])iii heai't. Treated in the 

 same manner as figure 8. 



10 Left crus; Cross section. /'', fasciculi of the N.l'.N. E, endocardium. 

 El', e|)ifascicular sheath. /, injection mass. B, blood vessel. .1/, myocardium. 

 P, perifascicular sheath. India ink injection. After Mallory's connective stain. 



11 liight crus. P, an uniujected perifascicular sheath which is especially 

 prominent due to shrinkage of the enclosed fasciculus during Hxation. Treat(-d 

 in a similar manner to that shown in figure 10. 



12 Cross section of a broad fasciculus taken from the apex of the left ven- 

 tricle of Bos taurus. ( ', connective tissue of the e]iifascicular sheath. 7', peri- 

 fascicular sheath. /, injection mass. /•', purkinje fasciculus. ^Lammory's con- 

 nective tissue stain and injection with India ink. 



174 



