THE LYMPHATIC SYSTEM. 



sac is bounded behind by the pectoral septum {p), and in fr 

 the maxillary septum (w). 



257 



ont by 



(6) The iliac lymph 

 sac [Saccns Hiacifs), 

 (Fig-s. 171 and 172 15, 

 173) does not really be- 

 long to the subcutane- 

 ous lymph-sacs^ as it 

 does not lie directly un- 

 der the skin except by a 

 very narrow border. It 

 is bounded in front by 

 the iliac septum^ above 

 by the dorsal septum, 

 and posteriorly by the 

 inguinal septum. By 

 these boundaries a sjîace 

 is enclosed, which lies 

 under the dorsal septum 

 and dorsal sac, and at 

 the same time partly 

 under the lateral sac. 

 In this sac the M. 

 glutaeiis, the anterior 

 ends of the M. vastus 

 exteruus, M. rectus an- 

 terior, and M. cutanens 

 iliacus, lie free together 



The lymph-sacs of Rana escuknta, 

 seen from the side. 



1 Dorsal lymph-sac. 



2 Ventral lymph-sac. 



3 Lateral lymph-sac. 



4 Submaxillary lymph-sac. 



5 Pectoral lymph-sac. 

 9 Femoral lymph-sac. 



10 Suprafemoral lymph-sac. 



12 Crural lymph-sac. 



IS Uiac lymph-sac. 



a Ventral septum. 



d Dorsal septum. 



i Inguinal septum. 



m Maxillary septum. 



m' Attachment of SI. submaxil- 



larLs to the skin. 



7) Pectoral septum. 



sm M. submaxillaris. 



V Vocal sac. 



Fig. 171. 



