G34 



Hosts: Wild geese (Anse.r anser) by Polonio, ISfiO; von Lin- 

 stow (1878, p. 155) records it in do.m/esticated <lu(ks (Anas 

 boachas dom.), but I can not trace his authority. 



Geogi-aphical distribution: Padua (by Polonio). Polonio is 

 apparently the only author who has seen this worm. 



Polonio (1860A, p. 22) gives the following as original 

 diagnosis: 



;;. T. imbutiformis Polonio. Corpus retrorsum inerassatum; 

 caput minimum; acetabulis orbicularibus anticis; collum 

 nullum; articuli supreml lineares, posteriores campanulato- im- 

 butiformes, ultimi campanulati, aperturae genitales laterales 

 elliptica-?. Long, 0.01. 



Habitaculum: Anser ferus, in intestlnis, Octob. et Nov. 

 Patavii (Polonio). 



Polonio (1860B, p. 121) simply mentions the parasite in his 

 list, and gives a very unsatisfactory figure of the worm. In 

 this figure a prominent body near the lateral margin is looked 

 upon as the genital pore. This body has much mo're the ap- 

 pearance of a testicle, cirrus pouch, or of a receptaculum 

 semlnis than it has of a genital pore. I am therefore inclined 

 to doubt very much whether this species is correctly placed by 

 Railliet (1893, pp. 313-314) in the genus Mesocestoides. Foirther- 

 more, the form is altogether too insufficiently described to be 

 recognizable. The figure shows extreme contraction near the 

 head. 



31. TAENIA MEGALOPS Nitzsch, 1829. 



(1825, Taenia anatis marila Crei)lin.» 



[PI. XX, figs. 264-267.] 



Diagnosis: Strobila up to 52mm long by O.omm brt)ad proxi- 

 mally, and 0.75mm broad distally. Head very lai'ge. rather tet- 

 ragonal, 1.4mm broad; suckers 0.57mni to 0.64mm in diameter; 

 rostellum absent (?) or not prominent and (?) without hooks. 

 Anterior segments very short, 12 trmes as broad as long; pos- 

 terior segments twice as broad as long, "narrowed at the base, 

 spread in form of a bell," colored yellowish by small longi- 

 tudinal lines. Genital po-res unilateral. Penis smooth, tubu- 

 lar, 70 /i hy 23 fi "situated on a very prominent and swollen 

 tubercle." Ova globular with 2 membranes; outer membrane 

 47 fi. inner 3S (/ in diameter: oncosphere 32 fi. hooks 15 /z; the 



