FISCHTHAL, J. J. and J. D. THOMAS.  Digenetic Trematodes of Marine Fishes from Ghana: Family Opecoelidae . . . . 129

NADAKAL, A. M., K. O. JOHN, K. MURALEEDHARAN, and A. MOHANDAS.  Resistance Potential of Certain Breeds of Domestic Fowl Exposed to Raillietina tetragona Infections.  I.  Contribution to the Biology of Raillietina tetragona (Molin, 1858) . . . . . 141

NADAKAL, A. M., K. O. JOHN, A. MOHANDAS, and K. MURALEEDHARAN.  Resistance Potential of Certain Breeds of Domestic Fowl Exposed to Raillietina tetragona Infections.  II.  Studies on the Periodicity of Segment Discharge by the Domestic Fowl Infected with Raillietina tetragona (Molin, 1858) . . . . 144

HEARD, R. W. III.  Parasites of the Clapper Rail, Rallus longirostris Boddaert.  II.  Some Trematodes and Cestodes from Spartina Marshes of the Eastern United States . . . . 147

SHER, S. A.  Revision of the Genus PratylenchoidesWinslow, 1958 (Nematoda: Tylenchoidea) . . . . . 154

GOLDBERG, A.  Development, Migration, and Survival on Pasture of Gastrointestinal Nematodes of Cattle: Summer Contamination . . . . 166

McCauley, J. E., J. E. PEQUEGNAT, and C. L. BROWNELL.  A New Species of Gonocerca Manter, 1925 (Trematoda: Hemiuridae) from the Eastern Pacific . . . . 169

SCHMIDT, G. D., G. W. ESCH, and J. W. GIBBONS.  Neoechinorhynchus chelonos, a New Species of Acanthocephalan Parasite of Turtles . . . . 172

HOPPER, B. E.  Free-living Marine Nematodes from Biscayne Bay, Florida, III.  Eurystominidae: Pareurystomina bissonettei sp. n. from Biscayne Bay and Other Locations . . . . . 175

BARRETT, R. E., and D. E. WORLEY.  Parasites of the Pika (Ochotona princes) in Two Counties in South-central Montana, with New Host Records . . . . 179

SAWYER, T. K.  The Influence of Seawater Medial on Growth and Encystment of Acanthamoeba polyphaga . . . . . 182

MYERS, B. J., R. E. KUNTZ, T. C. HUANG, and J. A. MOORE.  Urinary Bladder Involvememt in the Langur (Presbytis) Infected with Schistosoma haematobium (Bilharz, 1852) Weinland, 1858 . . . . . 189

OVERSTREET, R. M.  Baylisascaris procyonis (Stefański and Žarnowski, 1951) from the Kinkajou, Potos flavus, in Columbia  . . . . . 192

RAUSCH, R. L. and D. W. PRICE.  Ogmogaster trilineatus sp. n. (Trematoda: Notocotylidae) from the Fin Whale, Balaenoptera physalus L. . . . . 196

SCHAEFFER, P. W.  Periplaneta americana (L.) as Intermediate Host of Moniliformis moliniformis (Bremser) in Honolulu, Hawaii . . . . . 204

THATCHER, V. E.  The Genus Amphimerus Barker, 1911 (Trematoda: Opisthorchiidae) in Columbia with the Description of a New Species . . . . . 207

CABLE, R. M. and C. R. SANBORN.  Two Oviduct Flukes from Reptiles in Indiana: Telorchis compactus sp. n. and a Previously Described Species . . . . . 211

DAILEY. M. D.  The Transmission of Parafilaroides decorus (Nematoda: Metastrongyloidea) in the California Sea Lion (Zalophus californianus) . . . . . 215

McDANIEL, B. and C. C. Coffman.  The Labidocarpid Bat-mites of the United States (Acarina: Listrophoridea) . . . . 223

COLGLAZIER, M. L., L. LINDAHL, D. D. ENZIE, G. E. WHITMORE. And R. L. WILSON.  Effect of Management Systems on the Growth of Lambs and Development of Internal parasitism. IV. Field Trials with Lambs on Drylot and Pasture Involving Medication with Thiabendazole and Purified Micronized Phenothiazine . . . . 230

SHEFFIELD, H. G.  Schizogony in Toxoplasma gondii: An Electron Microscope Study . . . . 237

BUHLER, G. A. Monoecocestus giganticus sp. N. (Cestoda: Anoplocephalidae) from the Porcupine Erethizon dorsatum L. (Rodentia) . . . . . 243

RESEARCH NOTES

BECKLUND, W. W.  Current Knowledge of the Gid Bladder Worm, Coenurus cerebralis (= Taenia multiceps), in North American Domestic Sheep, Ovis aries . . . . 200

FISCHTHAL, J. H. and M. ASRES.  Two Cestodes of Amphibians from Ethiopia . . . 203

FRIED, B., D. A. FOLEY, and K. C. KERN.  In vitro and in vivo Excystation of Clinostomum marginatum (Trematoda) Metacercariae . . . . 222

DYER, W. G.  Ochetosomatid Trematodes from Snakes in North Dakota and Illinois . . . 229

ANNOUNCEMENTS

Report of the Brayton H. Ransom Memorial Trust Fund . . . . 188
Sixtieth Anniversary Banquet . . . . 242
Index to Volume 37 . . . . 248
Minutes – Four Hundred Forty-fifth Through Four Hundred Fifty-second Meetings . . . 246