mi,- iv no 1\ mphatics, onlv 



iwly; "ii the other hand, a small amount of the fluid 

 injected into a lymph sac traveled rapidly, but in 

 clu the lymph ing to their anatomical conecti 



\\": ed the lymph heart in the cardiectomized fi 



it was pumped, not through : r\ to tl sels, but 



through th the nervi rplained 



lal] dose. If the lymph tied 



It I ■ anterior lymph hearts of the ampl 



bud off from i bra] veil (B , or in a more primil 



ental veins which arc going 

 ertebrals i Ivnower 74). They d( vi lop earlii 



sterior hearts and have been found in I!, palustris, R. sylvatica and 

 R. virescens measuring about 6.5 mm., and in R. temporaria and 

 Bu measuring about 1.5 pun. Eoyer noted the prese 



blood in the early - if In, ili anterior and posterior hearts. 



ECnower brings out the fad in coi ion with the anterior hei 

 that they lie "ii t' om which they derive the stria 



muscle of their wall. ] I think, a very important point. The 



particular myoto ne Knower has shown may vary. 



The : i of the anterior lymph hearts can be readily seen in 



the dorsal surface of the tadpole, iehind the pr - ind thus 



they can 



Prom the anterior lymph heart develop two symmetrical ves 



of which m ard toward the head, the "the r backward toward 



tail. The posterior duct as described by i 1 livides into two 



running to the tip of the tail dorsal to the myoton 

 other pas ag icl along the ventral margins of the myotoi 



form the ventral caudal trunk. It is the brai 



dal trunks which ha studied so much in the living specimen. 



There is also a lateral branch which runs caudalward from the an- 

 terior lymph hi i the lateral surface of the myotomes half way 

 between the dorsal and ventral branches. This lateral trunk 

 quently i - n ith thi • ior l\ mph heart. 

 Wieliky (153), Jossifov (G2-65), and Favaro (36) 



terior lymph heart arose from the dilation oi udal lymph 



trunks which grow from the anterior lymph heart-, and Jourdain 

 (61) di a rapid destruction oi i on- 



