238 



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

 — Mustela fluviatilis, Beloii, 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 fiuviatilis, Aldrov. 587; Jonston, 104. pi. 28. f. 11 ; 

 Schone, 41 ; Charlet, 159. u. 7 ; Marseli, Dan. Pann. iv. 2. t. 1, 1726. 

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

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

 Minog, Rzsezynski, 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. 



2. Lampetra planeri. Fringed-lipped Lampern. 



Petromyzon planeri, Linn. Bloch, viii. pi. 78. f. 3 ; Linn. (edit, de 

 Gmelin) ; Schneid. Bloch, 531, 532, 4, 1801 ; Shaw, Gen. Zool. v. 

 pt. 2. p. 259, 1804 ; Jen. Man. Brit. Vert. 522. sp. 211, 1835 ; Mull. 

 Mem. de I'Acad. Berlin, 78, 1834 ; Cuv. Reg. An. ii. 404, 1829 ; 

 Yarr. Brit. Fish. 2 ed. ii. 607, 1841. — Lamproiea planer, Bonn. 

 Planches de I'Encycl. Meth. — Le PHromyzon planer, Lacepede, 

 Hist. Nat. des Poiss. i. 30. pi. 3, 1798. 



Hab. Europe. 



** Dorsal fin in contact with the second. 



3. Lampetra sanguisuga. Leech Lampern. 



Petromyzon Sanguisuga, Lacepede, Hist. Nat. des Poiss. ii. 99. 

 pi. 1 ; Supp. to Petromyzon ; Shaw, Gen. Zool. v. pt. 2. p. 261, 1804. 

 — Petromyzon planeri, var., Cuv. Reg. An. ii. 118. 



Hab. Europe, Seine. 



A very doubtful species ; Cuvier says it is the same as the former. 



4. Lampetra Lamottenii. American Lampern. 



Petromyzon Lamottenii, Lesueur, Hist. N. A. ; De Kay, Nat. Hist. 

 of New York, 382. pi. 7^. f. 249 (mouth), pt. 1 ; Zool. 1842. 

 Hab. N. America, New York. 



3. GEOTRIA, n. g. (Pisces, PI. IV. fig. 3.) 



Upper idternal tooth large, transverse, crescent-like, di^dded into 

 four lobes ; the two inner lobes small, acute ; outer truncated. The 

 lower internal tooth transverse, narrow, slightly sinuous. The labial 

 teeth numerous, far apart, conical, acute, in arched series, diverging 

 from the throat ; the innermost one larger, rest small ; the inner- 

 most one of the lower part on each side small, elongate, transverse, 

 ■with two small, rudimentary tubercles. Tongue with two elongate, 

 conical, arched teeth, with a triangular plate on the lower side of the 

 base. Throat with a very large dilatable pouch. Dorsal fins two, 



