PLATE 5 



EXPLANATION OF PIGUEES 



Injections of the early dorsal lymphatics, demonstrating their primary arrange- 

 ment in an irregular plexus which becomes bilateral. Through this plexus the 

 injection fluid, depending on conditions met, flows freely in different paths which 

 simulate the definitive channels of later stages (for this, compare figs. 9, 10, 12). 

 (K. palustris.) 



98 



