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The dissection of a female sea lamprey or Petromyzon marinus. ad, anterior dorsal cartilage; an, annular cartilage; au, auricle; bd, bile-duct; bp', basal plate; br, brain; cd, cardinal vein; d.ao, dorsal aorta; dm, dorsal muscles; ea, external gill aperture; ft, fibrous tissue; gr, groove canal; hp, basal plate to fontanelle; hv, hepatic vein; i, integument; i.ju; inferior jugular vein; int, intestine; ju, jugular; lg, lingual cartilage; lr, liver; m, buccal vavity; mv, median ventral cartilage; my, spinal cord; na, olfactory sac; na', pituitary pouch; na'', nasal aperture; na.c, nasal capsule; nc, notochord; n.ca, spinal canal; oc, cranial roof; oes, gullet; o.f, buccal funnel; ov, ovary; pc, pericardium; pd, posterior dorsal cartilage; pmt, protractor muscle of tongue; rmt; retractor of tongue; rt, respiratory tube; ss, lymph sinus; sv, sinus venosus; t, tongue; v, ventricle; v.ao, ventral aorta; vl, velum; vm, ventral muscles. -Parker, 1900

Lamprey Anatomy

The dissection of a female sea lamprey or Petromyzon marinus. ad, anterior dorsal cartilage; an, annular…

"The lamprey (Petromyzon marinus). I. Then entire animal; note the seven gill-slits of which the first is marked g.s., the nostril n., and the unpaired median fins. II. Ventral aspect of the head; u.t., upper teeth; l.t., lower teeth; p., the piston in the mouth. III. Upper surface of the head; n., the nostril with the pineal groove behind it; e., the eye." -Thomson, 1916

Sea Lamprey

"The lamprey (Petromyzon marinus). I. Then entire animal; note the seven gill-slits of which the first…