CHAPTER XVII 



FLAT WORMS 



CLASSIFICATION OF THE PLATYHELMINTHES (FLAT WORMS) 



Class 



Family 



Trematoda 



Cestoda 



Fasciolidae 



Paramphistomidae 



Schistosomidae 



Dibothriocephalidae 



Tamiidae 



NOTE. Two larval Taeniidae are found in man (Cysticercus celluloses and Echino- 



coccus polymorphous). 



Also two larval Dibothriocephalidae (Sparganum mansoni and Sparganum prolifer.) 

 Two parasites often referred to as ophthalmic flukes have been reported lying 



between the crystalline lens and its membrane. They have been considered as 



possibly trematode larvae. Distomum ophlhalmobium was found in 1850 in the eye 



of a child and Monostoma lentis in the eye of an old woman. 



TREMATODES OR FLUKES 



Flukes are generally leaf-like in outline, rarely cylindrical, and ex- 

 hibit marked variation in size and shape. They are nonsegmented and 



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