THE LYMPHATIC SYSTEM. 



257 



Fig. 171. 



sac is bounded behind by the pectoral septum (p), and in front by 

 the maxillary septum (w). 



(6) The iliac lymph- 

 sac (Saccus 

 (Figs. 171 and 172 

 1 73) does not really be- 

 long to the subcutane- 

 ous lymph-sacs,, as it 

 does not lie directly un- 

 der the skin except bv 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 space 

 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 .If. 

 f/!>ifae>ix, the anterior 

 ends of the 31. rasfn* 

 externv*. 31. reef its an- 

 tti-ltT. and ^[. cutanem 

 itiaci/s, lie free together 



The iymph-sacs of Rana etntlfnta, 

 seen frum the side. 



1 Dorsal lymph-sac. 



2 \ entral lymph-sac. 



3 Lateral lymph-sac. 



4 Submaxillary lymph-sac. 



5 Pectoral lymph-sac. 

 9 Femoral lymph-sac. 



10 Suprafemoral lymph-sac. 



12 Crnral lymph-sac. 



15 Iliac lymph-sac. 



a Ventral septum. 



d Dorsal septum. 



i Inguinal septum. 



w Maxillary septum. 



in' Attachment of M. submaxil- 



laris to tlie skin. 



p Pectoral septum. 



*in M. submaxillaria. 



v Vocal sac. 



