237 



3. ?Petromyzon americanus. American Sea Lamprey. 



Petromyzon marimis, SchsepflF. Beobachtungen, &c. viii. 184 ; 

 Mitch. Trans. Lit. & Phil. Soc. i. 461 . — Petromyzon americanus, Le- 

 sueur, Amer. Phil. Soc. (N. S.) i. 382 ; Hist. N. A. Fish. ined. plate ; 

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

 New York, 379. pi. 66. f. 216. pt. 1 ; Zool. 1842. 



Hab. N. America. 



4. Petromyzon nigricans. Bluish Sea Lamprey. 



Petromyzon nigricans, Lesueur, Amer. Phil. Soc. (N. S.) i. 385 ; 

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

 New York, 381. pi. 79. f. 247 (teeth indistuict), pt. "^1 ; Zool. 1842. 



Hah. N. America. 



5. Petromyzon argenteus. Silvery Lamprey. 



Petromyzon argenteus, Kirtland, Boston Journ. iii. 342. pi. 4. f. 3; 

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

 Hah. N. America, river Ohio. 



2. LAMPETRA. (Pisces, PL IV. fig. 2.) 



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

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

 nate, many-toothed, outer lobe largest. Labial teeth unequal, 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., Miill. — Lampetra, 

 sp., Ray. — Lampetra, Gray, Proc. Zool. Soc. 1851. 



* Dorsal fins separate. 



1. Lampetra fluviatilis. Lampern or River Lamprey. 



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

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

 V. pt. 106. 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 ; Mem. de I'Acad. 

 Berlin, 1%, 1834 ; Jen. Man. Brit. Vert. 521. sp. 210,' 1835 ; Yarr. 

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

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

 prycka, Daub. Encycl. M«th. — 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 hranchiale, Bonn. 

 Planches de 1' Encycl. Meth. — Petromyzon, Prick {negen-oog), Gro- 



