112 ILLINOIS BIOLOGICAL MONOGRAPHS [112 



SIS LONGICOLLIS. — leviter crenata; capite cum collo longissimo, lin- 

 eari continuo, truncato; osculorum raargine proininente. " 



Rudolphi (1810:107) gave a diagnosis and description which is 

 here quoted verbatim: 



"Taenia longicollis R. 



Taenia: capite truncato, collo longissimo, articulis subquadratis, ovariis race- 

 in osis. 



Frolich im Naturforsch. 24.P.124. Tab.4. fig.20.21. Taenia Salmonis Wart- 

 manni. 



Gmel. Syst. Nat. p. 3080. n. 91. Taenia Froelichii. 



Zeder Nachtrag p. 258. Alyselminthus longicollis. 



Rudolphi in Wied. Arch. III. i.p.113. Taenia longic. 



Zeder Naturg. p. 22>2>- n - 9- Halysis longic. 



"Hab. in intestinis Salmonum. In Salmonibus Wartmanni plurimis Froelich- 

 ius Augusto copiosam; in S. Trutta Zederus; ego in 5. Lavareto Majo et 5. Ma- 

 raenulis plurimis Februario, reperimus. In Sahnone Eperlano a se inventas am. 

 Treviranus mecum communicavit. 



"Descr. Vermes unum ad septum pollices longi, lineam dimidiam vel integram 

 lati. 



"Caput depressum, truncatum, exiguum ; osculis orbicularibus, binis tarn su- 

 perioribus, quam inferioribus, capitis margini antico approximatis, ut sub ejusdem 

 motu saepe antica omniaque simul appareant. Collum cum capite continuum, lon- 

 gissimum, tertiam circiter totius longitudinis partem sibi vindicans, depressum, 

 margine obtuso integerrimo. Corpus depressum, articulus anterioribus brevissimis, 

 reliquis subquadratis, marginibus singulorum antico et postico rectis, lateralibus 

 rotundatis, ut totius vermis latera crenata appareant. Articulus ultimus obtusus. 

 Ovaria in articulis posticis, inde vel caerulescentibus, vel nigrescentibus, distincta, 

 racemosa sive dendritica. 



"Obs. 1. An scolex tetrastomus supra dictus hujus Taenia proles nondum 

 articulata? Sed reliquarum Taeniarum foetus semper articulatos vidi, neque caput, 

 neque pars postica acuta conveniunt. 



"Obs. 2. Hujus speciei cum insequentibus ob articulos margine postico vix 

 incumbentes, ob capitis collique formam, affinitas magna ; differentiae tamen spe- 

 cificae singularum discrimen satis indicant. 



"Obs. 3. An quas Stellerus (Pallas N. Nord. Beytr. I.i,p,i02) in Eperlani 

 vesica natatoria reperit. Taenia hue pertinent? Conf. n. 113." 



Rudolphi (1819:149) quoted the diagnosis used by him before (Ru- 

 dolphi, 1810:107). He stated that he had found the species in Corego- 

 nus (Salmo) lavaretus at Greifswald, in C. (Salmo) maraenula=C . al- 

 bula and in Osmerus eperlanus at Berlin, that Frolich had found it in 

 Cor eg onus (Salmo) wartmanni, Frolich and Zeder in Trutta trutta. 

 Specimens in the museum at Vienna had been found in Salmo thymal- 

 lus=Thymallus vulgaris. He further stated that Martin had found it 

 in Salmo alpinus and in Trutta fario. This serves as a very excellent 



