6 ILLINOIS BIOLOGICAL MONOGRAPHS [6 



PAGE 



Taenia pollachii Rathke 187 



Choanoscolex abscisus (Riggenbach) La Rue 188 



Comparative Table of Selected Characters of Proteocephalus Species 192 



Description of Proteocephalid Species from Amphibia and Reptiles : 



Ophiotaenia perspicua La Rue 204 



O. lactea (Leidy) sp. inq 208 



0. filaroides La Rue 209 



0. lonnbergii (Fuhrmann) 214 



0. natter eri (Parona) 218 



O. racemosa ( Rudolphi) 220 



O. pigmentata (von Linstow) 226 



O. trimeresuri (Parona) 227 



O. calmettei (Barrois) 231 



O. punka (Cholodkovski) 237 



O. marenzelleri ( Barrois ) 240 



O. grandis La Rue 242 



Crepidobothrium gerrardii ( Baird) 246 



Comparative Tables of Selected Characters of Species of Ophiotaenia and 



Crepidobothrium 260 



Oochoristica cryptobothrium (von Linstow) La Rue 268 



Description of Species of Monticellia 



Monticellia coryphicephala (Monticelli) La Rue 268 



M. macrocotylea (Monticelli) 275 



M. diesingii ( Monticelli ) 276 



M. malopteruri (Fritsch) La Rue 277 



Distribution of Proteocephalidae 281 



Distribution of Proteocephalids of Amphibia and Reptilia 281 



Hosts and Localities Reported for Proteocephalids of Amphibia 



and Reptilia 283 



Families of Amphibia and Reptilia Harboring Proteocephalid 



Species 284 



Hosts and Localities of Proteocephalid Species Infesting Fish and 



the Species of Fish Infested 285 



Distribution of the Proteocephalids of Fish According to Continents 288 



Fish Harboring Two or More Proteocephalid Species 289 



Proteocephalids Occurring in Two or More Species of Fish 290 



Families of Fish from which Proteocephalids are known 305 



Life History of the Proteocephalidae 306 



Origin of the Proteocephalidae 307 



Bibliography 3 J o 



Explanation of Plates 3 l 9 



