94. OTTO F. KAMPMEIER 
eventually break through at certain points, so increasing the num- 
ber of portals of entry for the lymph stream, as shown in the 
drawing (fig. 24) of the lymph heart ina young toad. In figure 35 
HP lym.com. juget lot. jee aM ep 
AL 
si.proneph. || 
Fig. 18 Photomicrograph of a transverse section through the left anterior 
lymph heart region in a 7-mm. embryo of Bufo vulgaris (K. E. C., series B 27, 
slide.2, section 83). X 340. lym. com. jug. et lat., common segment of the 
lymphatica jugularis and lymphatica lateralis; *, temporary breaking away of 
the lymphatics just mentioned from the lymph heart (cor. lym. ant. sin.). Other 
references as in the preceding figure. 
such a condition is already intimated by the lymph vessel which 
branches off from the jugular duct and passes diagonally over the 
outer surface of the lymph heart.! 
' During the period of metamorphosis, the plexus of lymphatic vessels in the 
vicinity of the anterior lymph heart develop into the sub-scapular lymph sinus. 
The description of the transformation of the lymphatie system in the tadpole 
