2l8 



DISCOVERY REPORTS 



Fig. 10. Reconstruction of heart and aorta of 

 Gigantocypris viewed from the sagittal plane. 

 Fig. 12 is a continuation ventrally of this re- 

 construction, ao.g. aortic ganglion ; ao.v. aortic 

 valve; a.pc. anterior pericardium; c.n. cardiac 

 neurone; e.c.n. point of exit of cardiac nerve 

 from heart; h.v. hepatic valve; m.ao. aortic 

 muscle; m.h.v. branch of lateral subpericardial 

 muscle running to hepatic valve; m.Ls.pc. 

 lateral subpericardial muscle; m.n.e. nauplius 

 eye muscle; m.pc.d. pericardial dilator; t.p.t. 

 tube of parenchymatous tissue surrounding 

 stomach which runs up to the hepatic valve. 



