Florence 1». Sal)in 



563 



As is seen in Fig. (!, the duets which connect the lynipli sac and the 

 loiiii' plexus, join the ])lexus half way between the ear and the fore leg. 

 Once or twice, out of many injections in which the needle w^as introduced 

 between the eye and I'ar. tlie injection mass lias reached the veins in 

 two ways: one the usual course through the lymph heart, and secondly, 

 through ducts that follow the course of the external jugular vein to its 

 junction with the internal jugular, showing that the ducts along the 

 two veins anastomose. 



Fig. 6. Lymphatics in the neck of an embryo pig, 6 cm. long, showing the 

 modified lymph heart in the depth and the plexus of lymphatics along the 

 external jugular vein, x about 3. B. lymph node developing in the base of 

 the lymph heart; e, extravasation at the point of injection; Ip, long plexus of 

 lymphatics along the course of the external jugular vein; pin, primary lymph 

 node developing in the apex of the lymph heart. 



Fig. 7 is from a pig 11 cm. long and shows an injection of the 

 lymphatics made from two points : one between the eye and the ear, and 

 the other into the foot pad. The injection mass, both from the ducts of 

 the face and from the fore leg, has entered the long plexus and then 



