PÉREZ-PONCE DE LEÓN, G., and A. CHOUDHURY. Adult Endohelminth Parasites of Ictalurid Fishes (Osteichthyes: Ictaluridae) in Mexico: Emperical Evidence for Biogeographic Patterns . . . . . . 10
JUSTINE, J.-L., R. JOVELIN, L. NEIFAR, I. MOLLARET, L. H. S. LIM, S. S. HENDRIX, AND L. EUZET. Phylogenetic Positions of the Bothitrematidae and Neocalceostomatidae (Monopisthocotylean Monogeneans) Inferred from 28S rDNA Sequences . . . . . . 20
FOSTER, G. W., L. C. BRANCH, M. MACHICOTE, J. M. KINSELLA, D. VILLARREAL, and D. J. FORRESTER. Gastrointestinal Helminths of the Plains Vizcacha (Lagostomus maximus) from Argentina, with Observations on Interspecific Interactions Between Nematodes and Cestodes . . . . . . 26
HASEGAWA, H., T. DOI, T. TOCHIMOTO, and A. MYATA. Parasitic Helminths Collected from the Japanese Giant Salamander, Andrias japonicus (Temminck, 1837) (Amphibia: Cryptobranchidae), in Japan . . . . . 33
DRONEN, N. O., W. J. WARDLE, and M. BHUTHIMETHEE. Helminthic Parasites from Willets, Catoptrophorus semipalmatus (Charadriiformes: Scolopacidae), from Texas, U.S.A., with Descriptions of Kowalewskiella catoptrophori sp. n. and Kowalewskiella macrospina sp. n. (Cestoda: Dilepididae) . . . . . . . 43
GARDNER, S. L. and G. PÉREZ-PONCE DE LÉON. Yungasicola travassosi gen. n., sp. n. (Digenea: Dicrocoelidae: Eurytrematinae) from Two Species of Grass Mice of the Genus Akodon Meyen (Rodentia: Muridae) from the Yungas of Bolivia . . . . . . . 51
DAILEY, M. D., R. S. DEMAREE, and R. L. CRITCHFIELD. Galactosomum stelleri sp. n. (Trematoda: Heterophyidae) from the Northern Sea-Lion, Eumetopias jubatus (Schreber, 1776) (Carnivora: Otariidae) . . . . . . . 58
HASEGAWA, H., K. MURATA and M. ASAKAWA. Enterobius (Colobenterobius) pygatrichus sp. n. (Nematoda: Oxyuridae) Collected from a Golden Monkey Pygathrix roxellana (Milne-Edwards, 1870) (Primates: Cercopithecidae: Colobinae) . . . . . . . 62
GONZÁLEZ-SOLÍS, D., F. MORAVEC, V. M. VIDAL-MARTÍNEZ, and M. L. AGUIRRE-MACEDO. Redescription of Ascarophis ayalai (Nematoda: Cystidicolidae) from the Mayan Sea Catfish Ariopsis assimilis from the Bay of Chetumal, Quintana Roo, Mexico . . . . . 66
HOTEZ, P. J., Z. BIN, J. BETHONY, Q. JIN, J. M. HAWDON, H. A. YOUNG, S. SIMMENS, R. HITZELBERG, and B. C. ZOOK. Natural History of Primary Canine Hookworm Infections After Three Different Oral Doses of Third-Stage Infective Larvae of Ancylostoma caninum . . . . . . 72
GILLILLAND, M. G., III, and P. M. MUZZALL. Amphibians, Trematodes, and Deformities: An Overview from Southern Michigan . . . . . . 81
DIGIANI, M. C. Belostomatidae (Insecta: Heteroptera) as Intermediate Hosts of Digenetic Trematodes . . . . . . . . 89
DUSEK, R. J. and D. J. FORRESTER. Blood Parasites of American Crows (Corvus brachyrhynchos) and Fish Crows (Corvus ossifragus) in Florida, U.S.A. . . . . . . . . 92
DRONEN, N. O., and H.-W. CHEN. Endohelminths from the Little Blue Heron Egretta caerulea from the Texas Gulf Coast . . . . . . 96
OLIVA, M. E. and J. L. LUQUE. Endohelminth Parasites of the Trambollo Labrisomus philippii (Steindachner) (Osteichthyes: Labrisomidae) from the Central Peruvian Coast . . . . . . . . 100
SCHOLZ, T., E. STEELE, M. BECKHAM, and R. A. BRAY. Larval tapeworms (Cestoda: Dilepididae) from the Mummichog Fundulus heteroclitus (Linnaeus, 1766) and Striped Killifish Fundulus majalis (Walbaum, 1792) from South Carolina, U.S.A. . . . . . . . 104
GÓMEZ DEL PRADO-ROSAS, M. del C., J. N. ALVAREZ-CADENA, L. SEGURA-PUERTAS, and R. LAMOTHE-ARGUMEDO. An Accacoeliid Metacercaria Parasitizing the Arrow Worm Flaccisagitta enflata (Grassi, 1881) from the Mexican Caribbean Sea . . . . . . . 108