THE DEVELOPMENT OF THE MAMMALIAN JUGULAR 

 LYMPHSAC, OF THE TRIBUTARY PRIMITIVE ULNAR 

 LYMPHATIC AND OF THE THORACIC DUCTS FROM 

 THE VIEW POINT OF RECENT INVESTIGATIONS OF 

 VERTEBRATE LYMPHATIC ONTOGENY, TOGETHER 

 WITH A CONSIDERATION OF THE GENETIC RELA- 

 TIONS OF LYMPHATIC AND HAEMAL VASCULAR 

 CHANNELS IN THE EMBRYOS OF AMNIOTES 



GEO. S. HUNTINGTON 

 Columbia University, New York 



TWENTY FIGURES 



During more than a decade the attention of many morpholo- 

 gists has been attracted to the development and structure of 

 the vertebrate vascular system, and to the interdependent coiTe- 

 lations of its individual components. 



Our knowledge of the most important genetic phases of the 

 blood-vascular system has been far advanced by the careful and 

 thorough work of many independent investigators. To mention 

 the researches of Weidenreich, Maximow, Mollier, Dantschakoff 

 and Riickert is merely to cite the leaders in a long line of workers 

 who have cooperated in establishing the basic evidence for a 

 genetic interpretation of the haemal vascular system. A care- 

 ful analysis of the very extensive haemotological work of the 

 last ten years, with full consideration of the older investigations, 

 is given by my colleague H. von W. Schulte in a contribution 

 published as No. 3 of the Memoirs of The Wistar Institute of 

 Anatomy in Philadelphia. One of the most important sub- 

 divisions of the whole field of vascular inquiry deals with the 

 development of the vertebrate lymphatic system and with the 

 relations of t[ie same to the haemal components of the entire 

 vascular apparatus. In its main lines the anatomy of the adult 



259 



THE AMERICAN JOURNAL OF ANATOMY, \ OL. 16, NO. 3 



July, 1914 



