310 



OK THE NEMATODE FAMILY OxNATHOSTOMID^. 



Ex2)lanation of Lettering of Text-figures and Plates. 



b., 

 h.c, 



c. 

 cp.. 



C.S.. 



c.s.n. 



c.t., 



cd.p. 



e.p., 



e.s.. 



h.. 



h.h., 



Ii.m... 



L. 



button-like appendage of cervical 



sac. 

 ballonet. 



cavity of ballonet. 

 collar. 



cervical papilla, 

 cervical sac. 

 , neck of cervical sac. 

 cuticnlar tliickening. 

 caudal papilla, 

 excretorj' pore, 

 egg-sac. 

 hooks, 

 head-bulb, 

 head-muscle, 

 lip. 



l.p., lateral papilla. 

 l.p.n., nerve of lateral papilla. 

 n.r., nerve-ring. 

 ces., oesophagus, 

 rectal glands. 



r.ff.; 

 s., 



ser., 



s.m.p. 



s.m.p n.. 



sp.. 



sw. 



t., t.. 



spnies. 



serrations. 



submedian papilla. 



nerve of submedian papilla. 



spicule. 



sucker-like depression. 



teeth. 



tl., termination of tail. 



uterus. 

 vulva, 

 vagina. 



EXPLANATION OF PLATES I.-VIIL 



Fig. 1. Spiro.vys contorta. 

 2. 

 3. 

 4. 

 5. 



Tanqtia tiara. 



'Ecl>hioce2Dhalus sowtJiwelU. 



The head; dorsal (or ventral) view. 

 The head ; lateral view. 



Tail of male ; ventral view. (Right spicule broken). 

 Tail of male ; lateral view. 



Tail of male; lateral view, at a higher magnification, 

 to show the papillae. 



6. Spiroxys gangetica. The head ; dorsal (or ventral) view. 



7. ,, „ The head ; lateral view. 



8. „ „ Caudal extremity of male; ventral view. 

 Caudal extremity of male; lateral view. 

 Terminal portion of spicule. 



The head ; nearly dorsal view. 

 Tail of male ; ventral view. 

 ,^ „ Tail of male; lateral view. 



Tanqtia anomala. Tail of male ; lateral view. 

 Tanqua diadema. Tail of male ; ventral view. 

 ,, „ Tail of male: lateral view. 



EcJiinocephalus spinosissimus. Tail of male; nearly ventral view. 

 Terminal portion of spicule. 

 The lips ; dorsal (or ventral) view. 

 One of 'the lips ; lateral view. The cuticnlar 

 thickenings are seen by transparency. 

 „ „ Tail of male; ventral view. 



„ ,, Tail of male; lateral view. 



„ „ Terminal portion of spicule. 



JSchinocephahis mvltidentatus. The lips; dorsal (or ventral) view. 



„ „ One of the lips ; lateral view. The teeth 



are seen bj" transparency. 

 „ „ Tail of male ; ventral view. 



„ „ Tail of male ; lateral view. 



Terminal portion of spicule. 

 Anterior end : lateral view (optical section). 

 Surface view of one of the cervical papillae, 



surrounded by spines. 

 Profile view of one of the cervical papillae. 

 Tail of male ; ventral view. On the left-hand 

 side of the drawing most of the spines 

 have been omitted. 

 Tail of male ; lateral view. 

 The spicules. 



Terminal portion of left spicule. 

 Tail of female ; ventral view. 

 Tail of female ; lateral view. 

 Ova, some with embryos escaping, 



9. 

 10. 

 11. 

 12. 

 13. 

 14. 

 15. 

 16. 

 17. 

 18. 

 19. 

 20. 



21. 

 22. 

 23. 

 24. 

 25. 



26. 



27. 

 28. 

 29. 

 30. 



31. 



32. 



Gnatliostoma spinigerum. 



33. 

 34. 

 35. 

 36. 

 37. 

 38, 



