635 



eg-g-s are scattered through the median portion of the seg-ments. 

 Development: Unknown. 



Hosts: Tame ducli (Anas boschas dom.); Brazilian teal (A. 

 braziliensis); European teal (A. crecca); pintail (Dafila acuta); 

 white-headed duck (Eris.matura leucocephala) ; tufted duck 

 (Aythya fulig-ula); European scaup duck (A. marila); African 

 teal (A. nyroca). 



The chief character for this worm is the large head, 

 but it seems extremely doubtful whether this should 

 be taken as the basis of a species. The parasite cer- 

 tainly can not be recognized \Yith certainty from thc^ 

 present description, and should be considered as a 

 doubtful species until some of the original specimens 

 can be restudied. 



32. TAENIA NIGROPUNCTATA Crety, 1890. 

 [PI. XX. figs. 268-270.^ 



Diagnosis: Strobila to 140mm in length. Head small, 0.382m"i 

 broad; (?) rostellum and hooks absent; suckers 0.166mm by 

 0.137mm. Neck short, about same breadth as head. Young: 

 seg-ments rectang-ular, 0.5mm long by 1mm broad; older seg-- 

 ments almost quadrangxilar, 2mm long by 1.5mm broad; mature 

 segments 2.5mm to 3mm long by 1mm broad. Genital pores ir- 

 regularly alternate, slig'htly posterior to the middle of the mar- 

 gin. Male genitalia: in posterior portion of segment, testicles 

 12 in number, diameter 58 fi. equally distributed at sides of the 

 uterus; vas deferens convoluted in its lateral portion and in- 

 flated to vesicula seminalis 0.176mm by 0.098mm within the cirrus 

 pouch; cirrus pouch pyriform, 0.313mm by 0.137mm. Female 

 genitalia: Ovary vitellogene gland, shell gland? At anterior 

 border of the segment a spot is observed in the median line; 

 from this a median stem runs distally and is divided near the 

 height of the pore into two portions; the posterior portion, at 

 least, represents the uterus. Ova 62 n. with 3 shells; oncos- 

 phere 46 fi by 40 /i;. hooks 15 fi. 



Host: Migratory quail (Coturnix coturnix). 



33. TAENIA sp. Conard, MS. 

 [PI. XXI, figs. 275-276.] 



^Iv. Henry S. Conard (Haverford College) has re- 

 cently studied some tapeworms from chickens, evi- 



