CAIRA, J. N. Calliobothrium evani sp. n. (Tetraphyllidea: Onchobothriidae) from the Gulf of California, with a Redescriptions of the Hooks of C. lintoni, and a Proposal for Onchobothriid Hook Terminology . . . . . . 166
DUOBINIS-GRAY, L. F., J. E. TOOLE, and K. C. CORKUM. Distribution and Fine Structure of Tegumental Receptors in Onchocledius cyanellus (Monogenea: Ancyrocephalinae) . . . . . . . 175
NICOL, J. T., R. DEMAREE, Jr., and D. M. WOOTTON. Levinseniella (Monarrhenos) ophidea sp. n. (Trematoda: Microphallidae) from the Western Garter Snake, Thamnophis elegans, and the Bullfrog, Rana catesbeiana . . . . . . . 180
HAYUNGA, E. G., G. V. HILLYER, M. STEK, Jr., M. P. SUMNER, J. F. DUNCAN, and C. DEISANTI. Attempted Immunization of Mice Against Schistosoma mansoni by Inoculation with Purified Glycoprotein Antigens from Adult Worms . . . . . . . 184
KØIE, M., and R. J. G. LESTER. Larval Didymozoids (Trematoda) in Fishes from Moreton Bay, Australia . . . . . . . 196
JAY, J. M., and N. O. DRONEN. The Effects of Parasitism and Long Term Cutaneous Respiration Upon the Survival and Egg Production of the Lymnaeid Snail, Stagnicola bulimoides techella . . . . . . 204
DUNAGAN, T. T., and R. PRICE. Genital Ganglion and Associated Structures in Male Neoechinorhynchus cylindratus (Acanthocephala) . . . . . 206
AMIN, O. M. Hosts and Geographic Distribution of Acanthocephalus (Acanthocephala: Echinorhynchidae) from North American Freshwater Fishes, with a Discussion of Species Relationships . . . . . . 210
MILLER, D. M., and T. T. DUNAGAN. New Aspects of Acanthocephalan Lacunar System as Revealed in Anatomical Modeling by Corrosion Cast Method . . . . . . 221
GLEN, D. R., and D. R. BROOKS. Phylogenetic Relationships of Some Strongylate Nematodes of Primates . . . . . . . 227
SNYDER, D. E. Scanning Electron Microscopy of Adult Parascaris equorum (Nematoda) . . . . . . . . 237
BONE, L. W. Response of Adult Nippostrongylus brasiliensis (Nematoda) to Fluid Velocity . . . . . . . . 244
CID DEL PRADO VERA, I., A. R. MAGGENTI, and C. van RIPER, III. New Species of Spiruridae (Nemata: Spirurida) from Endemic Hawaiian Honeycreepers (Passeriformes: Drepanididae), the Japanese White-eye (Passeriformes: Zosteropidae) and a New Species of Acuariidae (Nemata: Spiruridae) from the Japanese White-eye Collected on the Island of Hawaii . . . . . . 247
TOLLIVER, S. C., E. T. LYONS, and J. H. DRUDGE. Species of Small Strongyles and Other Internal Parasites Recovered from Donkeys at Necropsy in Kentucky . . . . . . . 260
OVERSTREET, R. M., J. T. SELF, and K. A. VLIET. The Pentastomid Sebekia mississippiensis sp. n. in the American Alligator and Other Hosts . . . . . . . 266
BOYCE, W. M. The Prevalence of Sebekia mississippiensis (Pentastomida) in American Alligators, (Alligator mississippiensis) in North Florida and Experimental Infection of Paratenic Hosts . . . . . . . 278
MAGNUS, R., and A. D. JOHNSON. In Vitro and In Vivo Development of the Tetracotyles of Cotylurus flabelliformis (Trematoda: Strigeidae) . . . . . . . 283
HENDRIX, S. S., M. F. VIDRINE, and R. H. HARTENSTINE. A List of Records of Freshwater Aspidogastrids (Trematoda) and Their Hosts in North America . . . . . . . . 289
THUL, J. E., D. J. FORRESTER, and C. L. ABERCROMBIE. Ecology of Parasitic Helminths of Wood Ducks, Aix sponsa, in the Atlantic Flyway . . . . . . . . 297
SCHMIDT, G. D., Z. GREENBERG, and G. WERTHEIM. Tapeworms from Turkey and Syria in the Collection of the Late George G. Witenberg . . . . . . 312
KOZEL, T. R., and F. H. WHITTAKER. Ectoparasites of the Blackstripe Topminnow, Fundulus notatus, from Harrods Creek, Oldham County, Kentucky . . . . . . . . 314
BLANCHARD, J. L., A. M. HARGIS, and D. J. PRIEUR. Scanning Electon Microscopy of Ollulanus tricuspis (Nematoda) . . . . . . . 315
SNYDER, D. E. Cuticular Lesions on Adult Baylisascaris procyonis Passed Naturally from a Raccoon . . . . . . . . 317
LICHTENFELS, J. R., and C. F. STROUP. Eustrongylides sp. (Nematoda: Dioctophymatoidea): First Report of an Invertebrate Host (Oligochaeta: Tubificidae) in North America . . . . . . . . 320
MOSER, M., and J. SAKANARI. Methods for Long-term Collection of Fish Feces . . . . . . . 323