PLATE 2 



EXPLANATION OF FIGURES 



'■i Pig Heart Xo. 4. The left cms and a large part of the terminal network 

 have been injected. (Purkinje fil)ers). The only point of injection used in this 

 heart is indicated as before by the white ring near the left cnis. 



4 Beef Heart Xo. 55. The right ventricle, atrium and the conus are laid 

 open. The Knoten, right crus and the terminating branches of the S. V. S. are 

 all displayed by the injection mass. The Knoten and right crus have been dis- 

 sected out of the myocardium and the sub-endocardial connective tissue. A 

 large j)art of the endocardium has been stripped from tlie ventricular walls. 



c 



170 



