RESEARCHES IN HELMINTHOLOGY AND PARASITOLOGY 



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versely deeply striate ; subsequently reversed dish-shaped and finally 

 reversed bowl-shaped. Length about 18 lines. Head 0.375 mm. to 

 0.45 broad; widest .segments 0.125 long by 0.75 wide; posterior 

 segments 0.2 by 0.625 wide. Several specimensand fragments from 

 the intestine of the Kentucky warbler, Oporornis formosa. 



24 



25 



Figs. 23, 24, 25. — Tccnia oporornis ; 23, anterior part of body ; 24, 25, segments 

 posteriorly. 40 diameters. 



A tapeworm from the robin, Turdus migraiorius, obtained at 

 West Chester by Dr. Warren, seems to be the same as the Taiiia 

 angulata, Rudolphi, infesting European species of thrushes. Its 

 characters are as follows : 



Head broader than long, with spherical bothria at the lateral 

 angles ; a short conical rostellum enclosing a conical papilla closely 

 covered with two rows of alternating recurved hooks. Neck none. 

 Bodv at commencement nearly as wide or as wide as the neck, with 



Fics. 26, 27. — Ticnia aiignlata ; 26, anterior part of body 



ments. 40 diameters. 



27. posterior seg- 



hnear segments; subsequently obcuneate, becoming gradually wider; 

 the widest subcuneate twelve times as broad as long. Estimated to 

 be about 2 inches in length, with the greatest breadth about 3 mm. 

 In addition to the foregoing, I have observed Tcznia variabilis, 

 Rud., in our woodcock, Pliilohela minor, previously described from 

 various European wading birds, and TcByiia scolopcndra, Diesing, in 

 the horned grebe. Podiu'Ps cornutiis, previously described from a 

 Brazilian grebe. 



