INTRODUCTION 7 



Part IV. The development of the main lymphatic trunks, other 

 than the thoracic ducts, draining into the jugular lymph sacs, and 

 through them into the venous system, viz., the cervical, jugular and 

 supra-scapular lymphatics, and their 7nediastinal connections, and 

 the lymphatic return from the anterior extremity along the sub- 

 clavian vein. 



Part V. The interpretation of adult normal and variant lym- 

 phatic organization on the genetic basis, and the interdependence 

 of the adult venous and lymphatic systems. 



The present publication includes Parts I and II of the abo\'e 

 list. 



