450 The Vessels of the Limg of Necturiis ^Maciilatus 



vessels are not injected (Fig. 2). In injected specimens the main 

 blood vessels and their chief branches appear to be surrounded by a net- 

 work of anastomosing lymph vessels. The lymph vessels themselves 

 form a system of closed tubes. In none of the numerous preparations 

 which I have made have I seen any evidence of so-called lymph capilla- 

 ries, lymph spaces or lymph channels leading out from the lymph vessels. 

 A distinct wall could be demonstrated for every vessel and the injection 

 mass did not pass outside of this wall. 



Lymphatics of the Walls of the Stomach. — The intimate rela- 

 tion between the lymph vessels of the lungs and those of the stomach 

 renders it necessary^ to give a brief account of the latter. Reference to 

 Plate I, Fig. 3 will give an idea of the exceeding richness of the plexus 



D.a.. 



. . .Sbc. 



Fig. 3. Diagram of the duct of Cuvier and the principal venous trunks. 

 D. C, duct of Cuvier; Ji., internal jugular; Je., external jugular and jugu- 

 lar sinus; Sbc, subclavian; La., lateral; P. C, postcardinal. 



of lymph vessels present in the walls of the stomach. Along the dorsal 

 side (PL I, Fig. 1) there is present a large and irregular sinus which 

 communicates not only with the lymph vessels of the stomach and peri- 

 arterial lymph vessels of the lungs but also with those belonging to the 

 remaining viscera in the abdomen. On the ventral side (PI. I, Fig. 2), 

 as already mentioned, there is found in the angle formed by the diverg- 

 ing lungs a lymph sinus of considerable size and owing to the fact that 

 there are no valves, the entire plexus can be easily injected. 



Connection of Lymph Vessels with the Veins. — In order that 

 the connection of the lymph vessels with the veins may be clearly under- 

 stood it will be necessary to describe briefly the Ductus Cuvieri and the 



