EXPLANATION OF PLATE XIX. 



Oxysoma kachugae, sp. no v. 



Fig. 13. — 9 Head in profile seen from the right side. X 325. 

 ,, 14 — $ ■ Head in profile seen from right side. X 75. 

 ,, I5-— 5 • Junction of first and second part of the oesophagus 



showing tubules of oesophageal lumen. 

 ,, 16. — 9 . Outline of end of tail. X 75. 



Heterakis macronis, sp. nov. 



Fig. 17.— 9 . Anterior extremity seen in the sagittal plane. 

 X 75 (26-viii). 



,, 18. — 9 . Head in profile seen in focal plane of the mouth. 



X 325. 

 ,, 19. — 9 . Head in profile seen in focal plane to the right of 



the mouth. X 325. 



,, 20. — 9 . Tail seen from the left. X 325 (26-i). 



,, 21. — &. Tail seen from the ventral surface. X 2i6|. 

 (26-iii), The upper end of this figure should 

 be continuous with the lower end of figure 22. 

 i-iii — the sublateral papillae, 1-8, the sub- 

 ventral papillae, im. and 2m. the median ven- 

 tral papillae. 



,, 22. — cf . Tail continuation of fig. 21. 



,, 23. — cf . Anogenital aperture seen from the left side, with 

 left spicule extended. X 750 (26- vi). 



,, 24. — The nerve of the lateral membrane. X 750 (26-viii). 

 The attachment of the lateral membrane to the 

 lateral line is on the left of the figure.' 



