THE FAMILY OF " ROUND-MOUTHED " FISH. 411 



THE FRINGE-LIPPED LAMPERN. 



(Petromyzm Planeri*.} 



This Lampern, when full-grown, is easily to be distin- 

 guished from the River- Lamprey, or Lampern, by its much 

 greater thickness as contrasted with its length. On com- 

 parison, it may also be recognized at all stages of growth by 

 its having the broad edge of the circular lip furnished with 

 a thickly-set fringe of papillae, and by the depth and close 

 connexion of the two dorsal fins : from the Sea-Lamprey 

 it is distinguished by the mottled colouring of the latter. 

 The arrangement of the teeth is shown in the engraving. 



This species is found in the rivers of all parts of Ireland ; 

 in the Forth, the Teith, the Allan, and the Tweed, in Scot- 

 land ; and, in England, in the streams of Surrey, Sussex, 

 Lancashire, and Cornwall, and probably also in many 

 others. In this country its length is usually about 8 inches 

 in the males and 9 inches in the females. In food, habits, 

 spawning-time, colouring, &c., the Fringe-lipped Lampern 



* " Planer's Stone-sucker." 



T2 



