TABLE OF CONTENTS 



PAGE 



Introduction _ 7 



Historical — 9 



Synonymy _ lo 



Deiinitions of Families and Genera Considered ii 



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 yj 



Proteocephalus filicoUis ( Rudolphi ) 38 



P. esocis (G. Schneider) 48 



P. agonis (Barbieri) 51 



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 ( Miiller ) 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 ) „ I43 



P. perplexus La Rue iSi 



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 I75 



P. hemisphericus (Molin) sp. inq 175 



P. macro phallus (Diesing) sp. inq I77 



P. nematosoma (Leidy) sp. inq 177 



P. salmonis-umblae (Monticelli) sp. inq I79 



P. osculatus (Goeze) sp. inq 180 



Taenia siwplicissima Leidy 186 



Taenia belones Mullcr 187 



