Figure 1 from: Panha S, Kongim B, Sutcharit C, Naggs F (2013) Taxonomic revision of the Elephant Pupinid snail genus Pollicaria Gould, 1856 (Prosobranchia, Pupinidae). ZooKeys 287: 19-40. https://doi.org/10.3897/zookeys.287.4617

Figure 1 - Breathing devices of six genera within the Pupinidae; black arrow indicates the position of breathing devices. A Anterior and posterior canals of Pupina B Anterior canal and twisted posterior canal of Pupinella C Complete posterior tube in Raphaulus D Shallow posterior angled groove of Pollicaria, white arrow indicates the parietal declining shoulder inside peristome E Anterior (peristomal) groove inside aperture of Tortulosa F Thin posterior groove inside aperture of Schistoloma.