166 THE LYMPHATIC SYSTEM 



form a plexus within the capsule and larger trabeculae, and a peri- 

 vascular plexus in the walls of the blood vessels. 



The nerves of the spleen form a plexus of nonmedullated nerve 

 fibres about the larger arteries at the hilum. From this plexus 

 fine branches are distributed to the muscular tissue of the tra- 

 beculae and to the arterial branches down to their finest ramifica- 

 tions. Nerve fibres have not as yet been demonstrated within the 

 splenic pulp. 



