Nine species of gastrointestinal helminths were found in southern black-backed gulls (Larus dominicanus Lichstenstein, 1823) from Otago Peninsula. Eight of these, Parorchis acanthus, Echinostoma revolutum and Echinoparyphium recurvatum (Trematoda), Dildotaenia latovarium and Hymenolepis alaskensis (Cestoda), Sciadiocara tarapunga (Nematoda), and Profilicollis antarcticus and P. novaezelandensis...

In small samples of the siganid fishes Siganus rivulatus Forsskål et Niebuhr and S. luridus Rüppel (Teleostei) from off the Saudi coast of the Red Sea, some individuals of each fish were found infected with a new intestinal trematode. Those of S. rivulatus were infected with Hexangium saudii sp. n. (Trematoda: Microscaphidiidae), whereas those of S. luridus with Progyliauchen magnacetabulum sp....

The Trematoda Rudolphi, 1808 are a class of the phylum Platyhelminthes that comprises two subclasses, the Aspidogastrea Faust & Tang, 1936 and the Digenea Carus, 1863. The subclass Aspidogastrea is a small group (4 families, 12 genera considered valid, c . 80 species) parasitic in molluscs, fi shes and chelonians [ 1 , 2 ]. Aspidogastreans like the digeneans use molluscs as fi rst obligate host...

The present study used regression models to evaluate the existence of factors that may influence the numerical parasite dominance with an epidemiological approximation. A database including 3,746 fish specimens and their respective parasites were used to evaluate the relationship between parasite dominance and biotic characteristics inherent to the studied hosts and the parasite taxa. Multivari...

Ira Remsen and American Chemical Research LiteraSpecial Articles: ture: DR. FREDERICK H. GETMAN .........................................341 Properties of the Isolated Equine Encephalomyelitis The Publication of Scientific Research: DR. ATHERVirus (Eastern Strain): PROFESSOR J. W. BEARD TON SEIDELL ....................................................................................................