112 RESEARCHES IN HELMINTHOLOGV AND PARASITOLOGY. 



Monostoniioii Spatulatin)i, Leidy. Body flat, oblong, ovate, nar- 

 rowing anteriorly, obtuse posteriorly ; color white, with brown tort- 

 uous lines indicating the course of the oviduct. Mouth acetabuli- 

 forni, circular. Testes three, alternating on each .side, po.steriorly 

 with the oviduct. Ovaries on each side finely lobulated. Genera- 

 tive aperture small, a short distance behind the mouth. Penis 

 undistinguishable. Length 3 to 4 lines ; breadth '_> line. 



Twenty-three specimens were obtained by Prof. Jeffries Wyman 

 from the gall-bladder of a fish, the species of which has been for- 

 gotten. 



Distomuni /Uliosuin, Leidy. Body ovoid, anteriorly compressed, 

 conical, and incurved, posteriorly robust and obtu.se. Mouth sub- 

 terminal, transversely semicircular or crescentic, acetabulum much 

 larger than the mouth, sessile subcircular, with a large transversely 

 elliptical and bi-polar aperture. Generative aperture a little in ad- 

 vance and to the left of the acetabulum and provided with a promi- 

 nent circular lip. Length from i to 25^2 lines; breadth i-3d to i 

 line ; thickness i-4th to 3-4ths of a line. 



Several hundred specimens were obtained from the gall-bladder 

 of a fish by Prof. Wyman, but the species has likewise been for- 

 gotten. 



Tctrabothrium Barbatum, Leidy. Body delicate, filiform, quadri- 

 lateral, anteriorly narrowing, and then slightly widening again 

 towards the head, posteriorly three or four times the breadth of the 

 thickness ; anterior segments quadrate, with the posterior angles 

 projecting into barb-like lobe ; posterior segments transversely ob- 

 long quadrate, with the posterior margin on each side projecting 

 into a festoon-like lobe. Neck none, or a mere constriction. Head 

 larger than the commencement of the body, conical. Bothria four, 

 oblique, marginal, subcircular, large, fornicate, and folded at the 

 border. Mouth at the summit of a globular papilla, unarmed. 

 Length from i to 5 inches ; breadth anteriorly i-5th line, posteriorly 

 2-3ds of line. 



Numerous individuals were obtained from the intestine of a large 

 Odontaspis punctata f caught on the coast of New Jersey. 



Dibothriiini Speciosiun , Leidy. Head gradually' narrowing to its 

 extremity, which is funnel-shaped and truncated. Bothria two, 

 long, marginal, as wide as the head. Neck none. Anterior articuli 

 short, subcuneate, those .succeeding transversely sub-reniform, those 

 posterior more equally quadrate, with convex margins, except the 

 back one, which is emarginate. Length i }4. inches ; breadth ante- 



