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Entosphenus tridentatus (Gairdner).
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Geotria australis.
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Ammocoetes Aureus.
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Petromyzon fluviatilis (da Leunis-Ludwig).
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Catfishes, Ameiurus nebulosus Le Sueur, destroyed by Lampreys (Petromyzon narius unicolor De Kay). Cayuyga Park, N. Y..
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Petromyzon branchialis (Linnaeus).
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Head of Mordacia mordax, showing the single nostril, and seven branchial openings.
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Lampetra aurea (Bean).
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Petromyzon fluviatilis (Linnaeus).
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Petromyzon branchialis, Head Seen from Below.
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Mordacia mordax.
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Petromyzon fluviatilis, Head Seen from Below.
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Larval Form of Petromyzon branchialis, Formerly Known as Ammocoetes.
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Lamprey (1); Pride (2).
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Great Sea Lamprey (Petromyzon marinus Linnaeus).
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Sea Lamprey. Lampetra; Lampreda
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Petromyzon marinus (Linnaeus).
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Head of Petromyzon marinus, Seen from Below.
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Lamprey (petromyzon marinus).
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Sea Lamprey. Petromyzon marinus, L.
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Sea Lamprey. Petromyzon marinus.
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Lamprey, Petromyzon marinus L. Wood's Hole, Mass..
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Lake Lamprey (Petromyzon marinus unicolor De Kay) from Cayuga Lake, in Winter.
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Mouth of lake lamprey (Petromyzon marinus unicolor)...E, eye; S O, sense organs.