171] PROTEOCEPHALIDAE—LA RUE 171 



PROTEOCEPHALUS SAGITTUS (Grimm) 



Specific Diagnosis: Strobila small, as much as 45 mm. long by 1 

 mm. broad. Head thick, ending in an unarmed point. Suckers four, 

 in pairs on the basal part of the head. Suckers transversely elongated 

 and heavily muscled. Neck as much as 12 mm. long by 0.5 mm. broad. 

 (Probably many young proglottids were overlooked in this exception- 

 ally long neck.) Proglottids few. Youngest proglottids about quad- 

 rate, older ones longer. Last eight proglottids 1.4-1.5 mm. long by 1 

 mm. broad by 0.3 mm. thick. Last proglottid always rounded poste- 

 riorly. Cirrus-pouch large and clubshaped. Cirrus quite thick. Uterus 

 with uterine pouches, number unknown. Genital pore situated near 

 middle of lateral margin of proglottid. 



Habitat: In intestine of Cdbitis harbatula (type host), Peters- 

 burg (type locality) and Province of Novgorod. 



Grimm (1872:240-243) described some cestodes which he had col- 

 lected from the intestines of Cohitis harhatula at Petersburg and in the 

 province of Novgorod. These he named Taenia sagitta. He called at- 

 tention to the fact that Rudolphi (1819:144) had proposed the name 

 Bothriocephalus harhatulae for some cestodes from Cohitis harhatula. 

 Rudolphi gave no diagnosis nor description hence it is not possible to 

 determine the genus to which his specimens belonged. Grimm also 

 called attention to Diesing's (1850:608) reference to Bothriocephalus 

 harhatulae and that Diesing gave no description of the form. Von 

 Linstow (1878:260) listed Taenia sagittata Grimm (for sagitta) as a 

 parasite of Cohitis harhatula. Monticelli (1891:169) included Taenia 

 sagittata (for sagitta) in a list of cestode species parasitic in fish. Rig- 

 genbach (1896:267) included Ichthyotaenia sagittata (Grimm) in a list 

 of Ichthyotaenia. Liihe (1909:33) gave a very short diagnosis of Ich- 

 thyotaenia sagitta (Grimm) which he apparently derived from Grimm's 

 (1872) paper. La Rue (1911:475) included this species in a list of 

 Proteocephalus species. 



