YATES, J.A., and R.C. LOWRIE, Jr. Development of Yatesia hydrochoerus (Nematoda: Filarioidea) to the Infective Stage in Ixodid Ticks…187
HUIZINGA, H.W., and W.O. GRANATH, Jr. Seasonal prevalence of Chandlerella quiscali (Onchocercidae: Filarioidea) in Brain of the Common Grackle (Quoscalis quoscula versicolor)…191
PLATT, T.R. Evolution of the Elaphostrongylinae (Nematoda: Metastrongyloidea: Protostrongylidae) Parasites of Cervids (Mammalia)…196
PLATT, T.R., and W.M. SAMUEL. Mode of Entry of First-Stage Larvae of Parelaphostrongylus odocoilei (Nematoda: Metastrongyloidea) into Four Species of Terrestrial Gastropods…205
THRELFALL, W., and J. CARVAJAL. Heliconema psammobatidus sp. n. (Nematoda: Physalopteridae) from a Skate, Psammobatis lima (Chondricthyes: Rajidae), Taken in Chile…208
NICKLE, W.R., R.F.W. SCHRODER, and J.L. KRYSAN. A New Peruvian Hexamermis sp. (Nematoda: Mermithidae) Parasite of Corn Rootworms, Diabrotica spp…212
POINAR, G.O., Jr. Daubaylia olsoni sp. n. (Daubayliidae: Rhabditida) from the leech, Dina anoculata, in California…217
MILLER, D.M., and T.T. DUNAGAN. A Support Cell to the Apical and Lateral Sensory Organs in Moniliformis moniliformis (Acanthocephala)…221
AMIN, O.M. Variability and Redescription of Acanthocephalus dirus (Acanthocephala: Echinorhynchidae) from Freshwater Fishes in North America…225
AMIN, O.M, and D.G. HUFFMAN. Interspecific Variability in the Genus Acanthocephalus (Acanthocephala: Echinorhynchidae) from North American Freshwater Fishes, with a Key to Species…238
PFAFFENBERGER, G.S., B. NYGREN, D. DE BRUIN, and C. WILSON. Parasites of the Black-Tailed Prairie Dog (Cynomys ludovicianus) from Eastern New Mexico…241
HALDORSON, L. A Seasonal Survey of Metazoan Parasites of Arctic Cisco (Coregonus autumnalis) from Alaskan Arctic Coastal Waters…245
PALSSON, J., and M. BEVERLEY-BURTON. Helminth Parasites of Capelin, Mallotus villosus, (Pisces: Osmeridae) of the North Atlantic…248
FORRESTER, D.J., J.A. CONTI, A.O. BUSH, L.D. CAMPBELL, and R.K. FROHLICH. Ecology of Helminth Parasitism of Bobwhites in Florida…255
MUZZALL, P.M. Parasites of Trout from Four Lotic Localities in Michigan…261
LAMAN, T.G., D.L. DANIELL, and H.D. BLANKESPOOR. The Role of Gyraulus parvus as am Intermediate Host for Avian Schistosomes…267
HUEHNER, M.K. Aspidogastrid Trematodes from Freshwater Mussels in Missouri with Notes on the Life Cycle of Cotylaspis insignis…270
KRISSINGER, W.A. The Life History of Lutztrema monenteron (Price and McIntosh, 1935) Travassos, 1941 (Trematoda: Dicrocoeliidae)…275
HASEEB, M.A., and D. KAHN. Studies on Larval Trematodes Infecting Freshwater Snails in Pakistan. IX. Virgulate Xiphidiocercariae…282
STEK, M., Jr., and S.M. SULAIMAN. Thermal Effects on Schistosoma mansoni Irradiation-Attenuated Vaccine Production and Administration…287
COIL, W.H. An Analysis of Swimming by the Cercariae of Fasciola hepatica Using High Speed Cinematography…293
FRIED, B., and N.E. FREEBORNE. Effects of Echinostoma revolutum (Trematoda) Adults on Various Dimensions of the Chicken Intestine, and Observations on Worm Crowding…297
DANFORD, D.W., and J.E. JOY. Aspidogastrid (Trematoda) Parasites of Bivalve Molluscs in Western West Virginia…301
KAYTON, R.J., and D.C. KRITSKY. Sureshia trychopea sp. n. (Cestoda: Dilepididae) from White-Throated Swifts, Aeronautes s. saxatalis, (Aves: Apodiforms) with Notes on Dilepidine Cestodes Having a Vaginal Sclerite…305
KINGSTON, N., E.S WILLIAMS, R.C. BERGSTORM, W.C. WILSON, and R. MILLER. Cerebral Coenuriasis in Domestic Cats in Wyoming and Alaska…309
HOBERG, E.P. Alcataenia pygmaeus sp. n. (Cestoda: Dilepididae) from the Whiskered Auklet, Aethia pygmaea, in the Western Aleutian Islands, Alaska, with a Comment on the Genera Alcataenia and Rissotaenia…315
LONG, M.S., and R.G. STROUT. Sporulation of Eimeria tenella (Coccidia) Oocysts Revealed by Scanning Electron Microscopy…320
THATCHER, V.E., and W.A. BOEGER. The Parasitic Crustaceans of Fishes from the Brazilian Amazon. 9. Ergasilus callphysus sp. n. (Copepoda: Cyclopoida) from Callophysus macropterus…326
RESEARCH NOTES
BOAG, B. Effects of Different Concentrations of Formalin on the Preservation of Trichostrongylus retortaeformis (Zeder, 1800) (Nematoda)…331
SWANSON, J.A., and L.W. BONE. Response of Nippostrongylus brasiliensis (Nematoda) to Bile…332
DOUVRES, F.W., and W.P. WERGIN. Cuticular Abnormality of Oesophagostomum radiatum (Nematoda) Fourth-Stage Larvae Grown In Vitro…334
O'GRADY, R.T. A Monodelphic Ascaris suum…337
PYBUS, M.J., W.J. FOREYT, and W.M. SAMUEL. Natural Infections of Parelaphostrongylus odocoilei (Nematoda: Protostrongylidae) in Several Hosts and Locations…338
NICKLE, W.R., and H. KAISER. An Austrian Mermithid Nematoe Parasite Offers Biological Control of the Colorado Potato Beetle, Lepitinotarsa decemlineata (Say)…340
MESINA, J.E., Jr., and M.N. NOVILLA. Occurrence of Elaeophora poeli (Vryburg, 1897) (Nematoda) in the Phillippine Water Buffalo (Bubalus bubalis Linn.)…342
JENSON, L.A., J.A. SHORT, and F.L. ANDERSEN. The Survival of Protoscolices of Echinococcus multilocularis (Cestoda) at Constant Temperatures…343
SALAZAR-SCHETTINO, P.M., and Y.G. YANEZ. Abnormal Cysticerci (Cestoda) in the Human Brain…346
STUNKARD, H.W. The Genus Spirorchis MacCallum, 1919 and Family Spirorchiidae Stunkard, 1921 (Trematoda)…348
KNIGHT, R.A. Quantitation of Fasciola hepatica Egg Counts in Sheep…349
FRIED, B., and T.S. VATES. In Vitro Maintenance and Tracking of Echinostoma revolutum (Trematoda) Adults…351
LOTZ, J.M., and K.C. CORKUM. Notes on the Life Cycle of Dictyangium chelydrae (Digenea: Microscaphidiidae)…353
SLECKMAN, B.P., and B. FRIED. Glycogen and Protein Content in Adult Echinostoma revolutum (Trematoda)…355
BLOUIN, E.F., A.D JOHNSON, D.G. DUNLAP, and D.K. SPIEGEL. Prevalence of Black Spot (Neascus pyriformis: Trematoda: Diplostomatidae) of Fishes in Brule Creek, South Dakota…357
LEEK, R.G., and R. FAYER. Prevalence of Cryptosporidium Infections, and their Relation to Diarrhea in Calves on 12 Dairy Farms in Maryland…360
AUGUSTINE, P.C., and H.D. DANFORTH. Use of Monoclonal Antibodies to Locate Eimeria Sporozoites (Protozoa) in Intestinal Sections…361
GADLER, R.M., and A.C. OLSON, Jr. Eye Anomalies in the Leech, Dina anoculata, (Erpobdellidae)…363
CONTI, J.A., and R.K. FROHLICH. Gastrointestinal Parasitism in Pygmy Killer Whales…364
CONTI, J.A. Helminths of Foxes and Coyotes in Florida…365
CONN, D.B., and F.J. ETGES. Helminth Parasites of Anolis carolinensis (Reptilia: Lacertilia) from Southeastern Louisiana…367
DE BRUIN, D., and G.S. PFAFFENBERGER. Helminths of Desert Cottontail Rabbits (Sylvilagus auduboni (Baird)) Inhabiting Prairie Dog Towns in Eastern New Mexico…369
ANNOUNCEMENTS
Subject Index…373