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The second documented record of Callistochiton (Allerychiton) pachylasmae in the Strait of Messina is reported, 138 years after the original description from this locality. Some morphological features of this species are described better and figured with SEM, and the variability of the head valve sculpture has been examined. Published and unpublished data on the habitat and distribution of this rarely recorded species are briefly discussed, and a further complete specimen (from the Agamennone collection) is also analyzed.

A new species of Callochiton, C. stefaniae n. sp., is identified in the framework of investigations aimed to better characterise the Strait of Messina benthic ecosystem. The new species, found in a peculiar facies of hard bottoms densely colonised by the hydrocoral Errina aspera (Linnaeus, 1767), is morphologically distinct from the co-generic Callochiton septemvalvis (Montagu, 1803), living in the Mediterranean Sea and along other European coasts, and C. doriae (Capellini, 1859), living only in the Mediterranean Sea.

This study is based on specimens of the family Marginellidae Fleming 1828 from the Miocene (Tortonian) of South Piedmont sites in the surroundings of Stazzano (Alessandria): Rio di Bocca d’Asino, S. Agata Fossili and Castellania. Seven species are here reported, three of which described as new (Dentimargo elusiva, Eratoidea antoniae, and "Marginella” giuntellii), three already known [Stazzania marginata (Michelotti 1847), Volvarina oblongata (Sacco 1890), and Marginella deshayesi Michelotti 1847] and one identified only at generic level (Volvarina sp.). The distribution of the genus Dentimargo is extended to the Miocene (Tortonian) of Italy. Dentimargo has a wider distribution, and was already known from the Eocene of France and the Pliocene of Spain. Eratoidea antoniae is compared with the syntype of E. eratoformis (Hoernes & Auinger 1880) and with specimens of E. cf. eratoformis from the Pliocene of Estepona (Spain), here figured.

This study is based on specimens ofCymenorytis COSSMANN 1888 from several Italian and Spanish Pliocene localities. Two species,C. landaui andC. dellabellai, which were reported before correlated toMacromphalus brandenburgi (BOETTGER 1907), are described as new.C. brandenburgi is described and illustrated, on the basis of specimens from Ukraine and a comparison with a (Badenian) of Ukraine.C. landaui (Spain), whileC. dellabellai Italian localities), and the European Atlantic Pliocene (Huelva, Spain).