Zoological Society. 61 



Storer, Rep. on the Fishes of Massachusetts ; De Kav, Nat. Hist, of 

 New York, 381. pi. 79. f. 247 (teeth indistinct), pt.'l ; Zool. 1842. 

 Hab. N. America. 



5. Petromyzon argenteus. Silvery Lamprey. 



Petromyzoii argenteus, Kirtland, Boston Joum. iii. 342. pi. 4. f. 3; 

 De Kay, Nat. Hist, of New York, 382. pt. 1 ; Zool. 1842. 

 Hab. N. America, river Ohio. 



2. LAMPETRA. 



Upper inner tooth single, transverse, lunate, entire, with a conical 

 prominence at each end. Lower inner tooth single, transverse, lu- 

 nate, many-toothed, outer lobe largest. Labial teeth imequal, the 

 outer numerous, small, subequal, conical, in a single, submarginal 

 series, the inner larger, unequal ; of the upper part small, in series ; 

 of the sides in a single series, larger, with two or three conical tu- 

 bercles. Tongue with two compressed, pectinated teeth above, and 

 a large, crescent-shaped, transverse tooth below, crenated on the edge, 

 and with a larger, conical projection in the centre. 



Yarr. Brit. Fish. fig. p. 604 ; De Kay, Nat. Hist, of New York, 

 t. 79, 249 (bad). — Petromyzon, sp., Linn., Cuv., Mull. — Lampetra, 

 8p., Ray. — Lampetra, Gray, Proc. Zool. Soc. 1851. 



* Dorsal ^ns separate. 



1. Lampetra fluviatilis. Lampern or River Lamprey. 



Petromyzon Jluviatilis, Linn. Bloch, pt. 3. pi. 78. f. 1 ; Linn. (edit, 

 de Gmel.); Miill. Prod. 37. n. 307 ; Aldrov. 587 ; Penn. Brit. Zool. 

 V. pt. lOG. pi. 10, 1776-78; Schneid. Bloch, 530, 2, 1801 ; Shaw, 

 Gen. Zool. 257. pt. 2, 1804 ; Don. Brit. Fish. pi. 80, 1820-28 ; Flem. 

 Brit. An. 404, 1827 ; Cuv. Reg. An. ii. 404, 1829 ; Me'm. de I'Acad. 

 Berhn, 78, 1834 ; Jen. Man. Brit. Vert. 521. sp. 210, 1835 ; Yarr. 

 Brit. Fish. 2 ed. ii. 598, 1841 ; Pamell ; Rich. Faun. Bor. 294, 1836. 

 — Petromyzon fluviatilis, Cuv. Reg. An. ii. 118, 1817. — Lamproie 

 prycka. Daub. Encycl. Meth. — Nein-oga natting. Faun. Suec. 106. 

 — Petromyzon, ^-c., Artedi, gen. 64. syn. 89. sp. 99. — La petite Lam- 

 proie, Bloch, 34. pt. 3. pi. 78. f. 1. — La Lamproie branchiate, Bonn. 

 Planches de I'Encycl. Meth. — Petromyzon, Prick (negen-oog), Gro- 

 nov. Mus. i. 64. n. 114 ; Zooph. 38. — Mustela, Pliny, liv. 9. c. 17. 

 — Mustela fluviatilis, Belon, Aquat. 75. — Lampetra subcinerea, ma- 

 culis carens, Salv. Aquat. 62. — Lampetra, alterum genus, Gesn. 

 Aquat. 597. — Lampreda, Icon. Anim. 326. — Lampetra, medium ge- 

 nus. Will. Ichth. 106. tab. g. 2, 3. f. 1, 2 ; Ray, Syn. Pise. 25. n. 1. 

 — Lampetra fluviatilis, Aldrov. 587; Jonsto'n, 104. pi. 28, f . 11 ; 

 Schone, 41 ; Charlet, 159. n. 7 ; Marseli, Dan. Pann. iv. 2. t. 1, 1/26. 

 — Lampetra fluviatilis, media, Schwenck. Theriotr. Siles. 532. — 

 Jaatz me unagi, Kaempfer, Voy. dans le Japan, i. 156. pi. 12. f. 2. — 

 Minog, Rzaezynski, 134. — Lamproie, Fermin, Hist. Nat. de Surinam, 

 85. — Petromyzon, Kramer, Elenchus, 38. n. 1 ; Klein, Misc. Pise, 

 iii. 29. n. 1. 1. 1. f. 3. — Le Petromyzon pricka, Lacepede, Hist. Nat. 

 des Poiss. i. 18, 1798. 



Hab. Europe. 



