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Petromyzon fluviatilis (da Leunis-Ludwig).
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Petromyzon fluviatilis (Linnaeus).
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Petromyzon fluviatilis, Head Seen from Below.
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Kamchatka Lamprey, Lampetra camtachatica (Tilesius). Kamchatka.
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Lampetra wilderi Jordan & Evemann. Bouth of Brook Lamprey, Cayuga Lake.
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Lampetra wilderi Jordan & Everman. Larval brook lamprey in its burrow in a glass filled with sant.