THE CARDIAC NERVES AND GANGLIA. 



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Fig. IIS. — The heart and adjacent organs of an adult Limulus, showing the ostia; principal blood-vessels; 

 ganglionated median nerve, m.c.v.; 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. 



