118 



ILLINOIS BIOLOGICAL MONOGRAPHS 



[118 



pouches, smaller embryos, fewer and smaller testes which are differently 

 arranged. P. longicollis is much larger than P. fallax La Eue and P. 

 dubius La Rue and it differs further in having fewer uterine pouches, 

 a shorter cirrus-pouch, fewer ( ? ) and larger testes. The genital pore 

 is further anteriad in P. longicollis than in P. fallax or P. dubius. P. 

 longicollis differs from P. dubius La Rue in having fewer uterine 

 pouches, a shorter cirrus-pouch, fewer and larger testes and a different 

 arrangement of the same. P. longicollis does not closely resemble any 

 species reported from North America up to the present time. 



PROTEOCEPHALUS TORULOSUS (Batsch) 

 [Figs. 7, 78-80, 145, 146, 184] 



1782 : Taenia articulis rotundis 



1786: Taenia torulosa 



1788: Taenia orbicularis 



1791 : Taenia simplex 



1790 : Taenia torulosa 



1795 : Taenia cyprini idi 



1800: Rhytelminthus cyprini 



1802: Taenia torulosa 



1803 : Halysis torulosa 



1810: Taenia torulosa 



1819 : Taenia torulosa 



1845: Taenia torulosa 



1850: Taenia torulosa 



1861 : Taenia porulosa 



1884: Taenia torulosa 



1889 : Taenia torulosa 



1891 : Taenia torulosa 



1892: Taenia torulosa 



1894: Ichthyotaenia toridosa 



1896 : Ichthyotaenia toridosa 



1897 : Ichthyotaenia toridosa 



1901 : Ichthyotaenia toridosa 



1902 : Ichthyotaenia torulosa 



1905 : Ichthyotaenia torulosa 



1905: Proteocephalus torulosus 



1909 : Ichthyotaenia toridosa 



1911 : Proteocephalus torulosus 



