THE TREMATODE PARASITES OF FISHES. 



501 



33. 



34. 



35. 



36. 



37. 



38. 



39. 



40. 



Onos mustela. 

 Podocotyle reflexa. 



41. Onos tricirratus. 



Derogenes varicus. 



42. Ammodyfes lanceolatus. 



Hemiurus communis. 



Intestine, caeca and 

 stomach. 



Stomach. 

 Stomach. 



