«:j4 



Hosts: Wild geese (Anser anser) by Polonio. IStiO; von Lin- 

 stow (1S7S, 1). 15C) records it in clo.mestioateii ducks (Anas 

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



Oeographlcal distribution: Padua (by PoIonlo), Polonio is 

 apparently the only author who has seen this worm. 



Polouio (lS(iOA, p. '22) gives the followiiii; as original 

 diagnosis: 



X T. imbutiformis Polonio. Corpus rotroi-sum Incrassatum; 

 caput minimum; acetabulis orblcularibus anticls; collum 

 nullum; articuli supremi llneares. posteriorcs campanula/to- iin- 

 butiformes, ultiml campanulnti. aperturae genitales laterales 

 clliptlcav'. Lone. 0.01. 



Habitaculum: Anser forus. in intestinis. Oclob et Nov. 

 Patavli (Polonio). 



Polonio (1S60B, p. 121) simply mentions the parasite in h(s 

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

 this figure a prominent body near the lateral margin is loolced 

 upon as the genital pore. This body has much mai-e the ap- 

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

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

 to doubt very much whether tliis species is correctly placed by 

 Railliet (1S93, pp. 313-314) in the genus Mesocestoides. Purther- 

 more, the form is altogether too insufficiently described to be 

 recognizable. The figure sliows extreme contraction near the 

 head. 



31. TAENIA MEGALOPS Nltzsch. IS29 



[PI. XX, figs. 264-267.1 



Diagniisis: Strobila up to r>2inm long by 0.5mm l-road proxi- 

 mally, and 0.75'nm broad distally. Head very large, rather tet- 

 ragonal. 1.4i<im broad; suckers O.STmm to 0.64mm in diameter; 

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

 Anterior segments very short. 12 times 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 pores unilateral. Penis smooth, tubu- 

 lar. 70 fi by 23 /t "situated on a very prominent and swollen 

 tubercle." Ova globular with 2 membranes; outer membrane 

 47 ft. inner 38 u in diameter; oncosphere 32 ft. hooks 15 /i; the 



