FRINGED-LIPPED LAMPEHN. 



457 



CHONDROPTERYGII. 



PETROMYZWJE. 



THE FRINGED-LIPPED LAMPERN. 



PLANER S LAMPREY. 



Petromyzon Planeri, Planer's Lamprey, Bloch, pt. iii. pi. 78, fig. 3. 



,, ,, La Petite Lamproye, Cuvier, Regne An. t. ii. p. 404. 



,, ,, Planer's Lamprey, Jenyns, Man. Brit. Vert. p. 522, 



sp. 211. 



This species, when adult, is easily distinguished from the 

 Lampern last described, by its being much shorter in length, 

 and yet equally thick in substance : it may also be recog- 

 nised at all ages, on comparison with it, by its having the 

 whole broad edge of the circular lip furnished with numerous 

 papillae forming a thickly-set fringe, and by the depth and 

 close connexion of the two dorsal fins. 



I am indebted to the kindness of Sir William Jardine for 

 tAvo specimens of the young of this species, which were sent 

 from the Tweed. I subsequently obtained some from a brook 

 in Surrey, which were rather larger than those sent from the 

 North ; and have also received some specimens from Lan- 

 cashire, the males of which measure near eight inches in 

 length, and the females nine inches. 



VOL. II. 2 H 



