38 



Hiß I—' 



Fig. 1. Drawing of a portion of the varicose nerve plexus from the upper portion 

 of the left ventricle. X 90, slightly enlarged. Rapid silver method. 



Fig. 2. Nos. 1 and 3 more highly enlarged terminal filaments of the varicose 

 plexus, showing the simple form of end-bulb. No. 2 a portion of an isolated fibre with 

 a larger though simple end-apparatus. X 490, silver method. 



Fig. 3. Coarse fibre with end-apparatus of complex form from the left ventricle, 

 also a ganglion situated in the path of the intervening fibre. X 490, enlargend. Picric 

 acid fixation. In the upper part of the figure is seen a single fibre of the varicose 

 plexus with branches and end-bulbs. 



Fig. 4. A similar apparatus from a section of a ventricle of a mouse with the 

 same enlargment. Rapid silver. 



Fig. 5. Coarse non-varicose nerve fibrilla ending in a terminal expansion of pen- 

 nate form with a ganglionic thickening of the lower portion of the fibre. ^ 490, en- 

 larged. Golgi preparation. 



