Fig. 4. A. Right half of the fore-part of Doloria levis, viewed from the sagittal plane, to show the blood 

 system and associated muscles. B. Left half of pericardial floor and heart, which have been removed to 

 obtain the view shown in Fig. 3 A. a.e.pc. anterior entrance to pericardium; a.h.a. anterior hypostomal 

 apodeme; a.l.a. antenno-labral apodeme; ao.t. aortic tendon; ao.v. aortic valve; end. endosternite ; fr.a. 

 frontal apodeme; m.a.ao.oe. anterior aortic-oesophageal muscle; m.ao. aortic muscle; m.ao.e. aortic- 

 endosteinite muscle; m.l.s.pc. lateral sub-pericardial muscle; m.tn.s.pc. median sub-pericardial muscle; 

 m.n.e. nauplius eye muscle; 7n.pM0.0e. posterior aortic-oesophageal muscle; m.pc.d. pericardial dilator; 

 p.pc.f. floor of posterior pericardium; v. valve in supraneural vessel, (x 200 approx.) 



