Alder, Joshua, 1841, Observations on the genus Polycera of Cuvier, with descriptions of two new British species

Alder, Joshua, 1841, Observations on the genus Polycera of Cuvier, with descriptions of two new British species, Annals and Magazine of Natural History, Including Zoology, Botany and Geology, Being a Continuation of the ' Magazine of Botany and Zoology', and of Louden and Charlesworth's ' Magazine of Natural History' 6, No. 38, pp. 337-342

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https://doi.org/10.1080/03745484109442937

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https://doi.org/10.1080/03745484109442937

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