THONEY, D.A., and E.M. BURRESON. Ecological Aspects of Multicalyx cristata (Aspidocotylea) Infections in Northwest Atlantic Elasmobranchs…162
HENDRICKSON, G.L. Observations on the Life Cycle of Ornithodiplastomum ptychocheilus (Trematoda: Diplostomatidae)…166
HOISER, D.W., and B. FRIED. Infectivity, Growth, and Distribution of Echinostoma revolutum in Swiss Webster and ICR Mice…173
McLAUGHLIN, J.D. The Biology of Cyclocoelum mutabile (Trematoda) Infections in American Coots…177
DYER, W.G. Cestodes of Some Ecuadorian Amphibians and Reptiles…182
AMIN, O.M., and J.C. VIGNIERI. Acanthocephala from Lake Fishes in Wisconsin: The Giant Nuclei Pattern in Neoechinorhynchus robertbaueri and N. prolixoides (Neoechinorhynchidae)…184
SHULTS, L.M. Helminth Parasites of the Steller Sea Lion, Eumetopias jubatus, in Alaska…194
KINGSTON, N., T.L. McHOLLAND, E.S. WILLIAMS, M.S. TRUEBLOOD, andL. MAKI. Experimental Transmission of Trypanosoma theileri to Bison…198
DANFORTH, H.D. Ultrastructural Surface Interaction of Serum or Hybridoma Antibodies with the Pellicle of Eimeria tenella Sporozoites…204
ESSLINGER, J.H. Redescription of Ochoterenella digiricauda Caballero, 1944 (Nematoda: Filarioidea) from the Toad, Bufo marinus, with a Redefinition of the Genus Ochoterenella Caballero, 1944…210
ESSLINGER, J.H Redescription of Foleyellides striatus (Ochoterena and Caballero. 1032) (Nematoda: Filarioidea) from a Mexican Frog, Rana montezumae, with Reinstatement of the Genus Foleyellides Caballero, 1935…218
PALMER, C.A., D.D. WITTROCK, and B.M. CHRISTENSEN. Ultrastructure of the Body Wall of Larval Stages of Dirofilaria immitis (Nematoda: Filarioidea) in the Mosquito Host…224
POINAR, G.O., Jr. Rhabditis myriophila sp. n. (Rhabditidae: Rhabditida), Associated with the Millipede, Oxidis gracilis (Polydesmida: Diplopoda)…232
NANSEN, P., J. GRØNVOLD, SV. AA. HENRIKSEN, and J. WOLSTRUP. Predacious Activity of the Nematode-destroying Fungus, Arthrobotrys oligospora, on preparasitic Larvae of Cooperia oncophora and on Soil Nematodes…237
JASMER, D.P., R.B. WESCOTT, and J.W. CRANE. Influence of Cold Temperatures upon Development and Survival of Eggs of Washington Isolates of Haemonchus contortus and Ostertagia circumcincta…244
BONE, L.W., and K.P. BOTTJER. Acetylcholinesterase Release by the Sexes of Trichostrongylus colubriformis (Nematoda)…248
LYONS, E.T., J.H. DRUDGE, and S.C. TOLLIVER. Prevalence of Dictyocaulus arnfieldi (Nematoda) in Equids and Clinical Problems with Strongylus vulgaris (Nematoda) Mainly in Donkeys on a Farm in Central Kentucky…251
ESSER, R.P. A Water Agar En Face Technique…254
DOUVRES, F.W., and J.F. URBAN, Jr. Development of Ascaris suum from In Vivo-derived Thrid-stage Larvae to Egg-laying Adults In-vitro…256
DOUVRES, F.W., and R.H. FETTERER. Survival of Haemonchus contortus Adults in Defined, Semi-defined, and Complex Cell-free Media…263
BARTLETT, C.M., and R.C. ANDERSON. Pseudaprocta samueli sp. n. (Nematoda: Aproctoidea) from the Blue Jay (Cyanocitta cristata) in Canada, with Comments on the Genus…270
DUBEY, J.P. Coccidiosis in the Gallbladder of a Goat…277
HAYUNGA, E.G., and M.P. SUMMER. Evidence for Mannose as a Terminal Saccharide in the Lectin Binding Site of a Surface Membrane Glycoprotein of Schistosoma mansoni…282
LeFLORE, W.B., B. FRIED, and H.S.BASS. Histochemical Localization of Cholinesterase in the Excysted Metacercaria of Cloacitrema michiganensis (Trematoda)…284
MURRELL, K.D., D.A.LEIBY, C.H. DUFFY, and G.A. SCHAD. Comparitive Infectivity of Trichinella spiralis spiralis (from Domestic Swine) and T. spiralis nativa (from Polar Bear) for Arctic Foxes and Domestic Swine…286
MARTI, H., and K.D. MURRELL. Validity of Tongue Muscle Digestions for Prevalence Surveys on Rat Trichinellosis…288
ARCHER, J., S.J. TAFT, and R.P. THIEL. Parasites of Wolves, Canis lupus, in Wisconsin, as Determined from Fecal Examinations…290
LYON, R.E. Helminth Parasites of Six Lizard Species from Southern Idaho…291
SMITH, D.G. Notes on Leeches (Hirudinea) of the Connecticut Lakes Region of Northern New Hampshire…294
FERENC, S.A., T.L. TALLEVAST, and C.H. COURTNEY. Experimental Infection of the Brown Water Snake, Nerodia taxispilota, with Sebekia mississipiensis (Pentastomida)…296
LEEK, R.G. Infection of Sheep with Frozen Sporocysts of Sarcocystis ovicanis…297
SEESEE, F.M., and D.E. WORLEY. Taenia ovis krabbei from Grizzly Bears, Ursus arctos, in Montana and Adjacent Areas…298