Further observations on the medical leech; including a reprint from the Philosophical Transactions of two memoirs, comprising observations on the Hirudo vulgaris, or common rivulet leech; and on the H. stagnalis and H. complanata, now constituting the genus Glossopora / [James Rawlins Johnson].

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Further observations on the medical leech; including a reprint from the Philosophical Transactions of two memoirs, comprising observations on the Hirudo vulgaris, or common rivulet leech; and on the H. stagnalis and H. complanata, now constituting the genus Glossopora / [James Rawlins Johnson]. Public Domain Mark. Source: Wellcome Collection.