76 RESEARCHES IN HELMINTHOLOCxY AND PARASITOLOGY. 



9. Tcenia F.xpansa, Rudolphi. 



Hab. — The anterior two feet of a specimen were obtained from the 

 small intestine of an ox. 



10. Tcrnia Bacil/aris, Goeze ? 



Hab. — Several fragments, each almost an inch in length and half 

 a line in breadth, with short and broad cuneate segments, were ob- 

 tained from the intestines of Sea/ops aquaticus. 



11. To'Jiia Pest if era, Leidj'. 



Head small, continuous with the neck ; acetabula terminal and 

 oblique, hardly prominent beyond the outline of the neck, hemi- 

 spherical. Mouth not prominent, unarmed. Neck long. Segments 

 cuneate : those anterior short and broad, those posterior longer. 



Hab. — Three specimens from i ^ to 2 inches long, with the 

 greatest breadth 2-5ths of a line, were obtained from the small in- 

 testine of Molothms pccoris by Prof. Baird, and one specimen 4^ 

 long, with the greatest breadth 7 jds of a line, was procured from the 

 small intestine of Dolichonyx oryzivora. 



12. Tcenia Strigis Acadicce, Leidy. 



Two specimens, each about ij^ inches long and apparentl}' con- 

 sisting of the whole body, except the head and neck, were obtained 

 by Prof. Baird from the small intestine of Nydalc acadica. The 

 bod}' is compressed cylindroid, with the anterior segments narrow, 

 conical and those posteriorly moniliform. Breadth anteriorly ^th 

 of a line ; posteriorly "^id of a line. 



13. To'Jiia Variabilis, Rudolphi? 



A fragment 3 inches long and i line wide was procured by Prof. 

 Baird from the intestine of Scolopax minor. Segments short, broad, 

 and subcampanulate, the infero-lateral borders being everted. 



14. lecnia Dispar, Goeze. 



Several .specimens obtained by Prof. Agassiz from the intestine 

 of Meyiobranchus maculatus, without the head, are 3 inches long and 

 ^ a line wide, and have longitudinally oblong segments, with lat- 

 eral and alternate marginal generative apertures and filiform penes. 

 I further have obtained four specimens from Rana pipiens and two 

 about 6 inches in length from Bufo aviericaniis. 



15. 7(£7iia Lactea, Leidy. Head small, continuous with the neck, 

 without rostellum ; acetabula anterior, hemispherical, situated at 

 the four angles. Neck moderately long. Segments anteriorly 

 transversely oblong, posteriorly longer than the breadth, square 

 with rounded angles. Generative apertures marginal (indistinct in 

 the specimen). 



