.41] PROTEOCEPHALIDAE — LA RUE 41 



quoslibet enim articulos maculae pellucidae, et simul canalis lateralis pellucidi 

 species oboritur. Foramina non visa. 



"Obs. I. Goezius, qui ovaria non vidit, vermem proprie non articulatum esse 

 in posthumis reliquit, ipse vefo banc speciem aeque ac uUam aliam articulatam 

 observavi. A Bothriocephalo solido, in Gasterostei abdomine hospitante, omnibus 

 prorsus notis diversissima. 



"Obs. 2. Vermem in aqua fluviatili biduum vixisse, in puteali enecari. 

 Goezius observavit." 



Rudolphi (1819:148) adds nothing to his former data. Bellingham 

 (1844:317) in his catalogue of Irish Entozoa reported the finding of 

 Taenia filicollis in the intestine of Gasterosteus aculeatus. His observa- 

 tions added nothing to our knowledge of the structure of the worm. 

 Dujardin (1845:583) reported that he had found Taenia filicollis in 

 Gasterosteus aculeatus at Paris in 1838. His description, a part of 

 which seems to have been derived from Rudolphi (1810) reads: 



"Long de 50 a 8o mm., large de 2 mm. environ ; tete presque globuleuse, 

 distincte et portee par un cou tres-long, filiforme; — sans trompe; — articles presque 

 Carres, contenant des ovares ( ?) opaques egalement carres, qui laissent entre eux, 

 et sur les bords, des intervalles demi-transparents." 



"Rudolphi et Goeze I'ont trouve en Allemagne, dans le Gasterosteus aculeatus. 

 Je I'ai trouve aussi dans ce poisson, a Paris, en 1838; j'y ai vu des oeufs a double 

 enveloppe, dont I'externe, mucilagineuse, est longue de o mm, 06 a o mm, 10; 

 I'enveloppe interne, globuleuse, est large de o mm, 036, et les crochets de I'embryon 

 sont longs de o mm, 012." 



Dujardin (1845:583) also described a form from Gasterosteus pun- 

 gitius (laevis) which he named Taenia amhigua. His specimens were 

 collected at Rennes, France. His description reads: 



"Long de 6 mm, large de o mm, 5 a o mm, 8, forme de quinze a dix-sept articles 

 peu distincts et de forme tres-variable ; — tete petite, large de o mm, 17, sans trompe 

 et sans crochets tantot retractee tantot saillante, quelquefois globuleuse et separee, 

 par un cou tres-etroit, quelquefois a quatre lobes distincts, correspondant aux 

 ventouses larges de o mm, 068 a o mm, 07 ; — cou tres-contractile et dilatable, traverse 

 par quatre canaux larges de o mm, 009; — premiers articles males avec les orifices 

 genitaux irregulierement alternes, et les penis longs de o mm, 16, larges de o mm, 032, 

 rides transversalement ; — derniers articles informes, remplis d'oeufs globuleux a 

 double enveloppe ; — enveloppe externe mucilagineuse, longue de o mm, 053 a o mm, 

 058; — enveloppe interne longue de o mm, 034; embryon de o mm, 026, avec des cro- 

 chets de o mm, 0095." 



"Je I'ai trouve plusieurs fois a Rennes dans I'intestin du Gasterosteus laevis. 

 Son nom specifique exprime sa ressemblance avec les scolex et les caryophylles." 



If Dujardin 's description of his T. filicollis and his T. ambigua be 

 compared, it will be noted that in the measurements of the second egg 

 membrane there is very good agreement. The variation in the size of 



