rhinophores
From ZooTerms (Dictionary of Invertebrate Zoology)
rhinophores (noun, plural; Greek rhinos, nose; phorein, to bear): (Mollusca: Gastropoda) 1. In Opisthobranchia, the second pair of modified tentacles commonly surrounded at the base by a collarlike fold, located behind the first pair; chemoreceptors at base of the tentacles. 2. In Nautiloidea, a digitiform chemoreceptor present beneath each eye.
