I'ETROMYZIPE. 



CHONDROPTERYGII. 



PETROMYZID&. 



THE MYXINE. 



GLUTINOUS HAG, AND BORER, 



Gastrobranchus ctrcus, Blindjisli, BLOCH, pt. xii. pi. 413. 



,, ,, CUVIER, Regne An. t. ii. p. 406. 



,, ,, Glutinous Hag, PENN. Brit. Zool. vol. iii. p. 109. 



Miiine glutinrsa, LiNN.tus. 



,, ,, Glutinous Hag, FI.EM. Brit. An. p. 164, sp. 4. 



,, ,, ,, ,, JENVNS, Man. Brit. Vert. p. 523, 



sp.213. 



GASTROBRANCHUS. Generic diameters. Body elongated, cylindrical, 

 smooth; dorsal fin very low, continued round the tail to the vent ; a single 

 spiracle on the head communicating with the interior ; lips surrounded with 

 eight barbules or cirri ; mouth with one hook-like tooth ; tongue with two rows 

 of teeth on each side; branchial apertures two, placed under the commencement 

 of the belly. 



THE worm-like form of the fish figured above induced 

 several systematic authors, including Linnseus, to class it 

 with the Worms ; and it was not till after dissections and 

 published descriptions that its true relations with the Lam- 

 preys were acknowledged. Of these memoirs, that furnished 

 to the French Institute in 1797 by Bloch, the ichthyologist 



