356 Maey R. Ceavens and Harold Heath, A new Species of Nectonemertes. 



Fig. 10. Side view of anterior end of alimentary canal, slightly- 

 diagrammatic. 



Fig. 11. Section through posterior end of proboscis. 100: 1. 



Plate 22. 



Fig. 12. Cross section through brain region. 25 : 1. 



Fig. 13. Same through middle of body. 25 : 1. 



Fig. 14. Same through pedicel of caudal fin. 25 : 1. 



Fig. 15. Same through head at level of anterior end of intestinal 

 coecum. 25 : 1. 



Fig. 16. Same through body one fifth of total length from posterior 

 end of animal. 25 : 1. 



Fig. 17. Section through gonads; duct to exterior indicated by 

 dotted lines. 



Fig. 18. Section through region of cirri. 25 : 1. 



Fig. 19. Epithelium of mid dorsal line at about same level as fig. 16. 

 555: 1. 



Fig. 20. Section through caudal fin at level of posterior union of 

 lateral blood vessels. D, V dorsal, ventral surfaces. 25 : 1. 



