Description of Plate X. 
Figure. 
14, Sclerostomum vulgare. Cephalic extremity. Female. Ventra) 
view, 
15. Sclerostomum vulgare. Female. Natural size. 
16. Selerostomum vulgare. Male. Natural size. 
17. Seclerostomum vulgare, Caudal pouch. Male. Lateral view. 
18. Seclerostomum vulgare. Cephalic extremity. Male. Lateral view. 
19. Selerostomum vulgare. Cephalic extremity. Female. Latero- 
ventral view. 
20. Selerostomum vulgare. Caudal extremity. Female. 
21. Triodontophorus serratus. Casting its last moult arriving at 
mature state. Male. From a thrombus of the anterior 
mesenteric artery. 
22, Tyriodontophorus serratus. Cephalic extremity. Female. Lat- 
eral view. 
28. Triodontophorus serratus. Maile. Natural size. 
24. riodontophorus. serratus. Female. ‘Natural size. 
24a, Triodontoplhorus minor. Cephalic extremity. Female. 
25. Triodontophorus minor. Male. Natural size. 
26. Triodontopkorus minor, Female. Natural size. 
27. Cylichnostomum labiatum. Cephalic extremity. Female. Dorsal 
view. 
28. Cylichnostomum labiatum. Male. Natural size. 
29, Cylichnostomum labiatum. Female. Natural size. 
30. Cylichnostomum labiatum. Caudal extremity. Male. Lateral 
view. 
