(Section Polycotylea Monticelli) 



7. Family Polystomidae Beneden, 1858 



Subfamily: 



1. Polystominae* (gen. Polystomum). 



8. Family Octocotylidae Beneden and Hesse, 1863 



Subfamily: 



1. Onchocotylinae [gen. Squalonchocotyle, Onchocotyle 



(= Acanthochocotyle ) Rajonchocotyle) 



2. Octocotylinae [gen. Octocotyle , Dactycotyle 



(= Pterocotyle )7 



3. Octobothrinae* [gen. Octobothrium (=Glossocotyle + 



Ophicotyle) Diplozoon, Vallisia. ] 



4. Diclidophorinae [gen. Diclidophora ( = Choricotyle), 



Cyclobothrium, Heterobothrium ] 



5. Plagiopeltinae* [gen. Hexacotyle ( = Plagiopeltis)] 



6. Diaphorocotylinae* (gen. Erpocotyle, Anthocotyle) 



9. Family Hexacotylidae Monticelli, 1899(nn) 



Subfamily: 



1. Diplobothrinae* (gen. Diplocothrium) 



2. Plectanocotylinae* (gen. Plectanocotyle, Phyllocotyle) 



10. Family Platycotylidae(nn) 



Subfamily: 



I. Platycotylinae (gen. Platycotyle ) 



11. Fannily Pleurocotylidae(nn) 



Subfamily: 



1. Pleurocotylinae (gen. Pleurocotyle) 



12. Family Microcotylidae Taschenberg, 1879(n) 



Subfamily: 



1. Microcotylinae* (gen. Microcotyle) 



2. Axininae* (gen. Axine, Pseudaxine, Gastrocotyle) 



We shall often return to the system of Monticelli but for the 

 time being let us only note fronn the point of view of the rules of 

 nomenclature the inadmissibility of the use of the names of the families 

 and subfamilies accepted in the present (Monticelli's, nobis) system 

 which do not correspond to the type genera. 



394 



