HI] PROTEOCEPHALIDAE—LA RUE 111 



Eudolphi and others are open to question. Concerning this species Ru- 

 dolphi (1810:212) wrote: 



"In Salmonis Eperlani cavo abdominis Taeniam reperit (pro Fasciola habi- 

 tam) quatuor ad quinque lineas longam, capite oblongo obtuso; osculis duobus 

 superioribus anticis (totidem inferioribus in figura latentibus) orbicularibus exi- 

 guis ; collo nullo ; articulis transversis, obtusis. Cum collum nullum delineatum 

 sistatur, pro Taenia longicolli (n. 20) eodem in pisce obvia vix haberi potest, huic 

 enim longissimum conceditur." 



Frolich (1789:24) named a species Taenia salmonis Wartmanni 

 which is recognized by Rudolphi (1802a :113 and 1810 :107) as a synonym 

 of Taenia longicollis Rud. Frolich 's description, if he gave one, is not 

 accessible to the writer. The name with which he designated the species 

 is unavailable on account of its trinomial character. Gmelin (1790: 

 3080) gave a diagnosis of Taenia Froelichii. This species was consid- 

 ered by Rudolphi (1802a :113 and 1810:107) to be a synonym of Taenia 

 longicollis. Gmelin 's diagnosis reads: "TAENIA FROELICHII. No. 

 91. — T. capite cum collo longissimo tenuissimo marticulato continuo, ova- 

 riis dendaticis linea laterali cinctis. Froelich Naturf. 24 p. 124. t. 4. /. 

 20. 21. Habitat in Salmonis Wartmanni intestino duodeno." 



The name longicollis as a designation for a species of cestode was 

 first used by Zeder (1800:258) in connection with the generic name 

 Alyselminthus. Unfortunately Zeder 's description is not available to 

 the writer who therefore can not judge as to its character. Rudolphi 

 ( 1802a :113) gave a specific diagnosis of this species which he styled 

 Taenia longicollis. In his synonymy he cited Alyselminthus longicollis 

 Zeder, Taenia Salmonis Wartmanni Froelich, and Taenia Froelichii 

 Gmelin. After a statement regarding the hosts of this form he wrote : 



"Zeders Beschreibung ist vollkommen geniigend; wenn er Frolich tadelt, weil 

 dieser die baumschenartigen Figuren oder Eyerstocke der Glieder mit zur Bestim- 

 mung des Wurms braucht, so habe ich im Allgemeinen nichts dagegen, dass man 

 sie weglasst. Bey einigen Arten sind sie indessen besonders ausgezeichnet, so 

 auch hier, wo man sie. auf den ersten Blick gewahr wird, wesgegen auch die 

 letzten Glieder blaulich, oft sogar schwarzlich aussehen. Wo man erst den Press- 

 schieber zu Hiilfe nehmen muss, um sie zu sehen, darf man ihrer nicht erwahnen, 

 das versteht sich." 



Rudolphi gave no description of this species at this time nor were 

 there any drawings to accompany his comments. Zeder (1803:333) re- 

 ferred to this species under the name Halysis longicollis. In his syn- 

 onymy he lists Taenia salmonis Wartmanni Frolich, Alyselminthus lon- 

 gicollis Zeder, Taenia Frolichii Gmelin. His diagnosis reads: "HALY- 



