Annotated type catalogue of the Megaspiridae, Orthalicidae, and Simpulopsidae (Mollusca, Gastropoda, Orthalicoidea) in the Natural History Museum, London Author Breure, Abraham S. H. Naturalis Biodiversity Center, P. O. Box 9517, Leiden, the Netherlands Author Ablett, Jonathan D. Natural History Museum, Division of Higher Invertebrates, London, SW 7 5 BD, UK text ZooKeys 2015 2015-01-12 470 17 143 http://dx.doi.org/10.3897/zookeys.470.8548 journal article http://dx.doi.org/10.3897/zookeys.470.8548 1313-2970-470-17 0E78A6A90B82401199EED5895E7F8A9E FFDAFF85127CFFB3AA5915611C3A767A 578680 Bulinus opalinus Sowerby I, 1833 Figs 22iv-v , L15i Bulinus opalinus Sowerby I 1833 in Sowerby I and II 1832-1841 : 7, fig. 47; Sowerby I in Gray and Sowerby I 1839 : 144, pl. 38 fig. 8. Bulimus opalinus ; Pfeiffer 1848b : 107. Leiostracus perlucidus ; Simone 2006 : 123, fig. 384. Type locality. "Brazil" . Label. "Brazil" , taxon label in Pfeiffer's handwriting. M.C. label style IV. Dimensions. Not given. Figured specimen H 27.8, D 14.3, W 7.4. Type material. NHMUK 1975442, three probable syntypes (Cuming coll.). Remarks. Sowerby did not state on how many specimens his description was based; he wrote "Nob." , thus "ours" , meaning the author claimed his right as describer of the new taxon, not necessarily proof of presence in his own collection. As Breure and Ablett (2011 : 10) suggested that these might have been swapped with Cuming, the three specimens found are treated as probable syntypes. They are accompanied by two labels in Pfeiffer's handwriting; one "Bul. opalinus / Sow", the other in different ink "perlucidus Spix". In Pfeiffer 1848: 108 the dimensions "Long. 27, diam. 14 mill." were given; this corresponds to the largest specimen in the lot. The citation in Richardson (1995 : 207) to "Pfeiffer, Mono. Helic. Viv. 1: 231" refers to Helix opalina Sowerby I, 1841, and is thus in error. The current systematic position follows Simone (2006) . Current systematic position. Simpulopsidae , Leiostracus perlucidus (Spix, 1827).