71] 



PROTEOCEPHALIDAE — LA RUE 



71 



in ripe proglottids with 6-8 lateral pouches on either side. Uterine pores 

 2-3 in number. Outer membrane of uterine eggs thin and hyaline, mid- 

 dle membrane granular, 0.036-0.041 mm., embryo 0.031-0.0336 mm. in 

 diameter. 



Habitat: Intestine of Cor eg onus fera (type host) ; Lake Lucerne, 

 Switzerland (type locality). 



Type: No. 09.9 in Professor H .B. "Ward's collection. Slides from 

 same lot in Professor Ward's collection. 



Zsehokke (1884) reported and described in a very general way five 

 species of Proteocephalus. His Taenia salmonis umhlae and Taenia 

 torulosa are discussed in their proper places. The other three species, 

 his Taenia ocellata, T. filicoUis, and T. longicollis can best be discussed 

 together and in this connection. The small table shows the distribution 

 of the five species in the hosts from Lake Geneva examined by him. 



The Taenia filicoUis of Zsehokke 's description (1884:16-17) is from 

 Perca fluviatUis and may be the same as the specimens from the same 

 host species received by Dr. H. B. "Ward from Professor Parona which 

 La Rue (1911) has named P. dubius. It is certain that Zsehokke 's de- 

 scription and drawings of his specimens from this host do not agree with 

 Schneider's specimens of P. percae (Miiller). 



The specimens of T. ocellata which Zsehokke reported from Perca 

 fluviatUis are probably only longer specimens of his T. filicoUis. The 

 specimens reported by him from Esox lucius were probably Proteoceph- 

 alus esocis Schneider. It is doubtful if Lota vulgaris harbors the same 

 species of parasite as does the Salmonoid fishes. Zsehokke 's report on 



