179] PROTEOCEPHALIDAE—LA RUE 179 



PROTEOCEPHALUS SALMONIS-UMBLAE (Monticelli) sp. inq. 



(?) 1811-12: Taenia salmonis omul Pallas 1811-12:409 



1884: Taenia salmonis umblae Zschokke 1884:18-19 



1891 : Tetracotylus salmonis-umblae Monticelli 1891 : 



(?)1891: Tetracotylus salmonis-omul Monticelli 1891: 



1896 : Ichthyotaenia salmonis-umblae Riggenbach 1896 :267 



1896 : Ichthyotaenia salmonis umblae Zschokke 1896 :783 



1909 : Ichthyotaenia salmonis umblae Liihe 1909 :33 



1911 : Proteoccphalus salmonis-umblae La Rue 1911 :475 



This species was first described and delineated by Zschokke (1884) 

 who found it in Salmo umbla, Lake Geneva. His description and draw- 

 ings are inadequate for a determination of its position. Monticelli 

 (1891) considered this to be a species of Tetracotylus. He also stated 

 that he considered Taenia salmonis-omul Pallas a species dubia and 

 probably a synonym of T. salmonis-umblae. Monticelli wrote both of 

 these names with a hyphen and hence was the first to give these species 

 binary names. Kramer (1892) does not discuss the species. Riggen- 

 bach (1896) considered it to be a species of Ichthyotaenia. He did not 

 add anything to our knowledge of its structure. 



Zschokke (1896:783) listed this species in his summary of parasites 

 found in the fishes of Lake Geneva. He did not find it in any of the 

 fish from the Rhine altho he examined nearly 1200 fish. Nufer (1905) 

 who investigated the fish of Lake Lucerne made no report on this spe- 

 cies. Liihe (1909) placed this species in the genus Ichthyotaenia. Since 

 his diagnosis is short and concise it is here quoted in lieu of Zschokke 's 

 description (1884:18-19) : 



" Ichthyotaenia salmonis umblae Zschokke. 30-50 cm. lang, 1-2 mm. 

 breit. Am Scheitel eine leichte saugnapfahnliche Vertiefung. Proglot- 

 tiden langer als breit, ca. 100 bis 150 an Zahl, Hodenblaschen zahlreich ; 

 ein hodenfreies Mittelfeld scheint zu fehlen. Cirrus-beutel bis fast zur 

 Mittellinie reichend ; Genitaloffnung ungefahr an der Grenze von 2. und 

 3. Funftel der Proglottidenlangs. Uterus mit "zahlreichen" (ca. 6 ?) 

 Blindsacken jederseits. Kalkkorperchen sehr zahlreich, besonders in 

 Scolex und Hals. 



' ' Im Darm von Salmo salvelinus L. ; bisher nur aus dem Genfer 

 See bekannt." 



This species is too little known to permit a determination of its 

 position in the genus. On account of its larger size and more numerous 

 testes it seems certain that it is not the same as P. fallax or P. dubius. 

 It does somewhat resemble the P. neglectus from Trutta fario and there 



