Sowerby, G. B. II. (1866). Second monograph of the genus Helicina, including the genera Trochatella, Lucidella, Helicina, Schiascheila [sic!] and Alcadia, of authors. In G. B. Sowerby II (ed.), Thesaurus conchyliorum, or monographs of genera of shells. Vol. 3 (24-25): 277-302, pls 266-278. London, privately published.
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Sowerby, G. B. II
1866
Second monograph of the genus <i>Helicina</i>, including the genera <i>Trochatella</i>, <i>Lucidella</i>, <i>Helicina</i>, <i>Schiascheila</i> [sic!] and <i>Alcadia</i>, of authors. In G. B. Sowerby II (ed.), <i>Thesaurus conchyliorum, or monographs of genera of shells</i>. Vol. 3 (24-25): 277-302, pls 266-278. London, privately published.