148 PROCEEDINGS OF THE ACADEMY OF [March,. 



Plate XII. — Fig. 6. — Dorsal view of alimentary canal and reproductive system. 

 Fig. 7. — Dorsal view of alimentary canal and digestive gland. 

 Fig. 8. — View of right side of reproductive system. 

 Fig. 9. — Diagram of reproductive system. 



Plate XIII. — Fig. 10.— Central nervous system and adjacent nerves. 



Fig. 11. — Right side of body, showing distribution of principal nerves. 

 Fig. 12. — Dorsal view of central nervous system and origin of principal 



nerves. 

 Fig. 13. — Lateral view of pericardium, heart and the excretory system with 



main reservoir, nephrostome, ureter and external opening. 



