CLADORCHIINMi 



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A. Acetabulum or posterior sucker caudoterminal, subterminal, 



or ventroterminal, and behind the genitalia or at the 

 most embraced by the vitellaria — Super-family i,Param- 

 phistomoidea Stiles and Goldberger, 1910. 



B. Acetabulum or posterior sucker ventral and separated from 



the posterior extremity by, at least, a part of the genitalia 

 —Super-family 2, Fascioloidea Stiles and Goldberger, 1910. 



Super-Family Paramphistomoidea Stiles and Goldberger, 



1910. 



Synonym,— Amphistomata Rudolphi, 1801. 



Definition. — Prostomata with acetabulum, caudoterminal or sub- 

 terminal, or ventral close to the caudal end. Oral sucker and 

 oesophagus present. Caeca two in number. Hermaphrodites with 

 genital pore ventro-median, prse-equatorial, praetesticular, and prse- 

 ovarial, and with one or two prse-ovarial testes. Vitellaria paired. 



Type FsLmily.— Par amphislomidcB Fischoeder, 1901, restricted. 



CldkSSi^QBXion,— Par amphistomidcB Fischoeder, 1901 restricted; 

 GastrodiscidcB Stiles and Goldberger, 1910; GastrothylacidcB Stiles and 

 Goldberger, 191 o. The last-named family does not contain any 

 human parasites. 



Family I. Paramphistomid^e Fischoeder, 190 1, restricted. 



Definition.— Pyriform paramphistomoidea with ventral pouches 

 absent. 



Type Genus. — ParampMstomum Fischoeder, 1901 . 



Classification. — ^The Paramphistomidae are classified into the 

 following subfamilies iParamphistomince Fischoeder, 1910, restricted ; 

 CladorchilncB Fischoeder, 1901 ; and Diplodiscince Cohn, 1904; but 

 of these only the second concerns us. 



These suborders may be recognized as follows : — • 



A. Oral sucker without evaginations — Paramphistomince. 



B. Oral sucker with evaginations — Cladorchiince. 



Subfamily Cladorchiin^ Fischoeder, 1901. 



Definition. — -Paramphistomidae with oral sucker with evagination. 



Classification. — ^The Cladorchiinse can be subdivided into the 

 StephanopharyngincB Stiles and Goldberger, 191 0, with circular 

 evagination, and CladorchiincB senstl stricto. Fischoeder, 1910, with 

 paired evagination. This last subdivision contains the following 

 genera : Cladorchis Fischoeder, 1901, which is the type genus ;Ps5w^^o > 

 discus Sonsino, 1895; Chiorchis Fischoeder, 1901; Tasiorchis 

 Fischoeder, igoi ; Pseudocladorchis Daday, 1907; Microrchis Daday, 

 zgoy; Pfenderius Stiles and Goldberger, 1910; and Watsonius Stiles 

 and Goldberger, 1910 ; of which the last is of importance in tropical 

 medicine. 



It may be remarked that this subfamily will probably soon be 

 made a family, and its divisions subfamilies. 



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