RESEARCHES IN HELMINTHOLOGY AND PARASITOLOGY. 75 



[December, 1855. No. 151. See Bibliography.] 



NOTICES OF SOME TAPE WORMS. 

 By Joseph Leidy, M. D. 



1. T(€?iia Solmni, Lin. 



Hab. — Occasional in the Anglo-American and in the Negro. I 

 have one specimen with .segments 6 lines long by 2 lines wide, 

 obtained by Prof. Agassiz, from an Indian of Lake Superior. 



Note. — Among all the tape worms from man which I have seen 

 in this country — and I have taken the trouble to examine specimens 

 in many localities — I have never 3^et met with the Dibothrium latum 

 (^Bothriocephahcs latus) . 



2. Taenia Laticep/iala, Leidy. Head large ; acetabula opposite, 

 very prominent, hemispherical ; mouth slightly prominent, unarmed. 

 Neck short. Anterior segments of the body short, oblong square, 

 posteriorly square. Generative apertures marginal, alternate. Pro- 

 truding penis ; elongated conical. Length of one specimen 9 inches, 

 greatest breadth i-^ of a line. Breadth of head y^ a line ; of neck ^ 

 a line. 



Hab. — The small intestine of Hystrix dorsata. 



3. Tctnia Serrata, Goeze. Head not broader than the neck, con- 

 vex anteriorly ; mouth prominent, furnished with a circle of strong 

 hooks. Neck long. Anterior segments transversely oblong or 

 cuneate ; posteriorly square. Length of three specimens 9 to 12 

 inches; greatest breadth i}4 lines. Breadth of head yi a line. 



Hab. — From the small intestine of an Esquimaux dog, which was 

 brought from the Arctic regions of North America by the eminent 

 naval navigator, Dr. E. K. Kane, U. S. N. 



4. Taenia Cucumcrina Bloch. 



Hab. — Common in the small intestines of all varieties of our dogs. 



5. T<znia El/iptica, Batsch. 



Hab. — Common to the domestic cat. 



6. TcBnia Crassicollis, Rudolphi. 



Hab. — Numerous specimens were obtained from the small intestine 

 of a single cat. 



7. TcB7iia Piisilla, Goeze. 



Hab. — Not uncommon in the introduced Norway rat. 



8. ligyiia Pcctinata, Goeze. 



Hab. — Eight fragments from i to 4 inches long, with the greatest 

 breadth i}4. lines, and having cuneate segments, short and broad, 

 were obtained from the small intestine of Lepits sy/vatiacs. 



