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  1. The anatomy of Arenicola assimilis, Ehlers, and of a new variety of the species, with some observations on the post-larval stages
    By: Ashworth, J H
    Type: Article
    In: Quarterly Journal of Microscopical Science
    Volume: 46
    Date: 1903
    Page Range: 737--785
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  2. The anatomy of Scalibregma inflatum Rathke
    By: Ashworth, J H
    Type: Article
    In: Quarterly Journal of Microscopical Science
    Volume: 45
    Date: 1901
    Page Range: 237--309
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