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Nachdruck verboten. 



The Deyelopment of the Thoracic and right Lymphatic Ducts 

 in the Domestic Cat (Felis domestica). 



By Charles F. W. McClurb, Princeton University, U. S. A. 

 With 13 Figures. 



In a paper read before the Association of American Anatomists 

 at its recent meeting in Chicago in January 1908, Prof. Huntington 

 and the writer gave a detailed account of the development of the 

 jugular lymph sacs in the cat and demonstrated the same on a series 

 of wax reconstructions made after the method of Born. For a com- 

 plete account of their development the reader is referred to the 

 Proceedings of the Society^). It may be mentioned here, however, 

 that the primary principle underlying the development of the jugular 

 lymph sacs in the cat is the separation of parallel venous channels 

 from the embryonic veins by a process of fenestration and the sub- 

 sequent conversion of these channels into the definite lymph sacs by 

 a process of growth and fusion. At the time when these anlages of 

 the lymph sac are connected with the veins they were designated by 

 Huntington and the writer by the name of "veno-lymphatics". 



Although there can be no doubt as to the venous origin of the 

 jugular lymph sacs Huntington and the writer were unable, at the 

 time of the meeting, to present conclusive evidence concerning the 

 venous origin of the tributaries of these sacs and, therefore, regarded 

 it possible that a somewhat similar condition might prevail in the cat 

 as that described by Sal a 2) for the embryo of the chick, in which 

 one portion of the lymphatic system is developed in connection with 

 the veins (posterior lymph hearts with coccygeal veins), while the 

 remainder is developed independently of the same (hypogastric plexus 

 and thoracic ducts). 



1) Huntington and McClure, The Development of the Jugular 

 Lymph Sacs in the Domestic Cat (Felis domestica). Proceedings of the 

 Association of American Anatomists for 1908. Anatomical Record, Vol. 2, 

 No. 1. (In Press.) 



2) Sala, Ricerche n. Lab. di Anat. norm. d. R. Univ. di Roma, 

 Vol. 7, 1900. 



