No. I.] 



STUDIES ON LIMULUS. 



167 



s.c.n./'^ 



Fig. 18. - Diagram showing the lateral sympathetic nerve and its relations to the haemal and cardiac 

 nerves and the ventral cord (seen from the neural side). 



1, "T-^n*' ^'^'^°"''"al ganglia ; a.i.n. anterior branch of intestinal nerve of ninth neuromere : 

 ^.«7 ", haemal nerves of the seventh to sixteenth neuromeres; /.«.7-iS, intestinal nerves of 

 the seventh to fifteenth neuromeres; l.s.n., lateral sympathetic nerve; «.«.9-i3, neural nerves 

 of the mnth to thirteenth neuromeres ; /./.«., posterior branch of intestinal nerve of ninth 

 neuromere ; j.c.«.7-i3, segmental cardiac nerves of the seventh to the fourteenth neuromeres; 

 V.C., ventral cord. ' 



