502 



PETROMTZONTID^. 



Lamprey, Pennant, Brit. Zool. iii. p. 102, pi. 10 ; Comtek, Fish. Brit. 



JsL iv. p. 385, pi. 247. fig. 1 *. 

 Petromyzon lampetra, Pall. Zoogr. lioss.-As. iii. p. 66. 

 aniericanus, Lesueur, Trans. Am. Phil. Soc. i. p. 383; Dekay, 



New York P'aun. Fish. p. 379, pi. 66. fig. 216 ; Storer, Mem. Amer. 



Acad. ix. 1867, p. 251, pi. 38. tig. 4. 



maculosus, Grunov. hyst. ed. Gray, p. 2. 



Dentition : Born, in Heusinyer, Zeitschr. f. Organ. Phys. i. 1827, 



pp. 183, 194, taf. 0. figs. 6 & 9. 



Two pointed maxillary teeth close together ; mandibulary tooth 

 single, crescent-shaped, with from seven to nine cusps. Two pairs 

 of lunate, pectinate lingual teeth; the teeth of the anterior pair 

 confluent. Suctorial disk with numerous conical teeth, arranged in 

 oblique series, those nearest to the buccal cavity being largest and 

 partly bicuspid. First dorsal fin rather widely separated from the 

 second. The distance of the last'gill-opening from the extremity of 

 the snout is one-fifth, or in small individuals one-fourth of the total 

 length. Body marbled ^ith black. 



Coasts and rivers of Europe, North America, and \Yest Africa. 



a. Adult. Merrimack River. Purchased of Mr. "Wright. 



h, c. Adult. New York. Purchased of Hr. Brandt. 



d. Six inches long. Nova Scotia. Presented by J. M. Jones, Esq. 



e—f. Adult. Lough Neagh. Presented by E. Patterson, Esq. 



ff. Adult : stuffed. Firth of Forth. Purchased of Dr. Parnell. 



h. Seven inches long. Scotland. Presented by Dr. Johnston. 



i, k, I. Adult. England. 



m-n. Adult : stuffed. England. 



0. Adult. Baltic. From the Haslar Collection. 



p. Adult. Holland. From the Collection of Dr. van Lidth do 



Jeude. 

 q. Adult. Lisbon. Presented by the Rev. R. T. Lowe, 

 r. Seven inches long. Mediterranean. Purchased of Mr. Cutter. 

 s. Eight inches long. West Africa. Presented bv J. C. Salmon, 



Esq. 

 t. Adult. Purchased of Mr. Jararaeh. 



2. Petromyzon fluviatilis. 



River Lamprey or Lampern ; Fluss-Neunauge. 



Mustella, Anson. MoseU. v. 107. 



Mustella fluviatilis, Bellon. Do Aqnat. p. 75. 



Lampetra parva et fluviatilis, Band. De Pise. Fhr. p. 202 ; Aldroi\ 



p. 581; Jomtoti. De Pise, il tab. 28. fig. 10; Wi/liu/hhi/, p. 106, 



tab. G 3. fig. 2 ; Marsil. Danub. Pan. 3Iys. iv. p. 2, tab.'l. ' 

 Lampetra subcinerea, Salvian. fol. 63 a. 

 Petromyzon, sp. no. 1, Artedi, Synmi. p. 89 ; Gen. p. 64 ; Spec. p. 99 ; 



Gronov. Mus. i. p. 64. no. 114, and ZoojiJiyl. p. 38. no. 359; Klein, 



Pise. Miss. ii. p 29, tab. 1. fig. 3. 

 Petromyzon fluviatilis, L. Syst. Nat. i. p. 394 ; Bl. Fisch. Detdschl. iii. 



* The woodcut on p. 3'J4, illustrative of the dentition, is entirely incorrect ; 

 also the figure given by Yarrell is foulty. 



