88 RESEARCHES IN HELMINTHOLOGY AND PARASITOLOGY. 



having a truncated conical aperture with the apex posterior. A 

 terminal pore to the body. 



31. Clinostonium Gracile, Leidy. Head semi- ovoid, anteriorly 

 obliquely truncated. Mouth tran.sver.sely oval, with a prominent 

 margin and a second border, which is slightly emarginated below. 

 Body compressed oblong, oval, convex above, concave below, obtuse 

 posteriorly, acetabulum larger, immersed between the head and 

 bod}'. Length to 3 lines, breadth to i line. 



Found in the intestine of Esox and within cysts in the gills, fins, 

 and muscles of Pomotis vulgaris. 



32. Clinostomum Diibiinn, Leidy. Head compressed oval, convex 

 anteriorl)^ Mouth minute, not bordered. Body compressed oblong 

 oval. Ventral acetabulum immersed between the body and head. 

 Length 2^2 lines, breadth 2-3ds of a line. 



From the intestine of Rusticola minor. 



33. Holostomum Cornu, Nitzsch. Found in the small intestine of 

 Ardea herodias. 



34. Holostomum Nitidum, Leidy. Body divided by a constriction 

 at the anterior third, everj^where echinated. Head ovoidal. Mouth 

 terminal, round, opening into a cup-shaped pharj-nx. Body com- 

 pressed oblong oval, variegated white with yellow. Length to i jf-4 

 lines, breadth 2-5ths of a line. 



Two specimens were obtained from the small intestine of Rana 

 pipiens. 



35. Diplodiscus Subclavahis, Diesing. Found in the intestine of 

 Rana pipiens. 



36. DiplostomuTn Cuticola, Diesing. Head elongated elliptical, 

 excavated inferiorly, obtu.sely angular, much longer than the body. 

 Mouth small, round, pharynx o\-al, gizzard oval. Generative aper- 

 tures hemispherical, situated just posterior to the middle. Body 

 ovoid, with a terminal excretory pore. Length from i-5th to i-3d 

 of a line. Contained in oval sacs about y^ a line in length. 



Found in great number in the liver of Pomotis vulgaris. 



37. Aspidogaster Co?ichicola, Baer. Leidy, Pr. A. N. S., v, 224. 



38. Malacobdclla (irossa, Blain. Leidy, Pr. A. N. S., v, 209. 



Cephalocotyi^ea. 



39. Cysticercus Pasciolaris. Rud. Common in the liver of the rat, 

 Mus deaimanus. 



40. Cysticercus Ccllulosce, Rud. Occa.sionally in the mu.scles of the 

 hog, Sus scrofa. 



