TABLE OF CONTENTS 



PAGE 



Introduction 7 



Historical - 9 



Synonymy 10 



Definitions of Families and Genera Considered n 



Methods of Technique 14 



Anatomy and Histology of Proteocephalids 16 



Characters of Diagnostic Value 33 



Key to the Better Known Genera and Species of Proteocephalidae 34 



Description of Proteocephalid Species 37 



Proteocephalus filicollis ( Rudolphi ) 38 



P. esocis (G. Schneider) 48 



P. agonis (Barbieri) Si 



P. exiguus La Rue 54 



P. pusillus Ward 58 



P. pinguis La Rue 65 



P. fallax La Rue 70 



P. neglectus La Rue 78 



P. dubius La Rue 81 



P. cernuae (Gmelin) La Rue 86 



P. percae (Muller) 93 



Table Showing Comparative Data on P. ocellatus and P. percae.... 106 



P. longicollis (Zeder) 109 



P. torulosus ( Batsch) 1 18 



P. macrocephalus (Creplin) 129 



P. ambloplitis ( Leidy ) 143 



P. perplexus La Rue 1S1 



P. singularis La Rue 156 



P. sulcatus ( Klaptocz) 162 



P. pentastoma (Klaptocz) 165 



P. fossatus (Riggenbach) 167 



P. skorikowi (von Linstow) 169 



P. sagittus (Grimm) 171 



P. salvelini (Linton) 174 



P. cyclops (von Linstow) sp. inq i/S 



P. hemisphericus (Molin) sp. inq i/5 



P. macro phallus (Diesing) sp. inq 177 



P. nonatosonia (Leidy) sp. inq 177 



P. salmonis-umblae (Monticelli) sp. inq 179 



P. osculatus (Goeze) sp. inq , 180 



Taenia siinplicissima Leidy T 86 



Taenia beloncs Muller l &7 



