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  1. ; (, The Nautilus)
    Leal, José (Ed.)
    Three new records of Bathysciadium pacificum Dall, 1908 from off Oregon and Washington extend the range of the species from Peru by ~7,300 km to the temperate northeastern Pacific. The preserved and relaxed animal shows that the mantle exten-sions are not sensory papillae, but mantle folds forming the periostracum rays on the shell. Examination of radula, mantle, and mantle cavity by scanning electron microscopy (SEM), including environmental SEM (ESEM) of the fluid-preserved animal, adds a novel dimension to the understanding of the anatomy of these rare deep-sea snails. ESEM is a suitable tool for the morphological investigations of rare natural history specimens. The monotypic genera Bathypelta Moskalev, 1971 and Bonus Moskalev, 1973 are re-synonymized under Bathy-sciadium Dautzenberg and H. Fischer, 1900. No mineralization of the radula was detected by SEM-Energy Dispersive Spec-troscopy (EDS/EDAX) mapping. 
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