THE CARDIAC NERVES AND GANGLIA. 



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FIG. 115. The hea5t and adjacent organs of an adult Limulus, showing the ostia; principal blood-vessels; 

 ganglionated median nerve, m.c.w.; the cardiac plexus; the pericardial nerves, p. .; the lateral, l.c.n., and seg- 

 mental cardiacs, s.c.n. 6-13. From Patten and Redenbaugh; slightly modified. 



