BY T. HARVEY JOHNSTON, M.A., D.SC. 89 



Filaria physignatni. 



Fiff. 18. Head end of male. 



19. Head end of female. 



20. Portion showing valva. 



21. Tail end of female. 



22. Tail end of male. 



Heterakis cathoturinus . 

 Fig. 23. Anterior end of female. 



24. Lips. 



25. Tail end of male. 



Plate IV. 



Heterakis catketnrinus . 



Fi<y. 26. Tail end of female. 

 27. Tail end of male. 



Heterakis hancrofti. 

 Fig. 28. Head end of male. 



29. Lips. 



30. Tail end of male. 



Heterakis chenonettce. 

 Fig. 31. Anterior end of female. 



32. Lip. 



33. Posterior end of male. 



Oxyspirura anthochcerce. 



¥io. 34. Head end of male. 



35. Tail end of male. 



36. Tail end of female. 

 Filaria, sp. from Acanthonenys 



Fi(y. 37. Anterior end of female. 

 38. Posterior end of female. 

 Echifwrhynchus menurce. 



Fi<y. 39. Anterior end of female. 

 40. Posterior end of female. 



Echiiiorhynchus rotundocapitatus . 

 Fig. 41. Entire male worm. 



Plate V. 

 Cittotcenia baiicrojti. 

 Fig. 42. Portion of segment showing one set of 

 genitalia. 



