TREMATODES : CLASSIFICATION 23! 



front of ovary. Genital pore, median in anterior third of body. Thick flukes, almost 

 circular in cross section. 



Family. Paramphistomidae, Fischoeder, 1901. 



Amphistomata : Body not divided into a conical anterior portion and disc-like 

 caudal portion. Ventral pouch absent. 



Sub-family. Param phi storm inse, Fisch., 1901. 

 Paramphistomidas : Oral sucker without evaginations. Not in man. 



Sub-family. Cladorchiinae, Fisch., 1901. 



Paramphistomidae : Oral sucker with evaginations ; testes, two, deeply cleft 

 (fig. 137). Genera: Watsonius, Cladorchis, etc. 



Family. Gastrodisciidae, Stiles and Goldberger, 1910. 



Amphistomata : With body divided into a conical cephalic and disc-like caudal 

 portion (fig. 138). Posterior sucker ventro-terminal. Oral sucker with evaginations. 

 Genera : Gastrodiscus and Homalogaster. 



Group. Distomata, Retzius, 1782. 



Gut forked, two suckers, the .posterior sucker (acetabulum) ventral. It is 

 always separated from the hind end by at least a part of the genitalia. 



Family. Fasciolidae, Railliet, 1895. 



Large flat forms, genital pore in front of ventral sucker, the latter powerful, 

 Vitellariae of numerous follicles, united by branching vitellarian ducts, at the sides of 

 the body meeting posteriorly and extending ventrally and dorsally. Cirrus and 

 vagina without spines. No crown of strong spines around sucker. Testes much 

 branched. Uterus not well developed. Excretory bladder much branched. Eggs 

 large. 



Sub-family. Fasciolinae, Odhner, 1910. 



Large or median forms, gut much branched. Body has a shoulder separating 

 head from body. Receptaculum seminis absent. Ovary branched, ventral sucker 

 in anterior part of body. Genus : Fasciola. 



Sub-family. Fasciolopsinae, Odhner, 1910. 



Shoulder absent. Receptaculum seminis present. Ovary branched, gut takes 

 a zig-zag course with kinks on it, ventral sucker in anterior part of body. 

 Genus : Fasciolopsis. 



