436 



CHONDnOPTERYGlI. 



KAIID.E, 



J?J//DA' 



THE THORNBACK. 



Rata clavuta, Tltortilnick, Willughby, p. 74. 



,, LiNN.i;us. CuviKR, Regne An. I. ii. p.398. 

 ,, Thornback, Bloch, pt. iii. pi. 83, female. 

 ruhiis. Rough Eaij, ,, ,, pi. 84, male. 



clavata, Thorvhuck, Montagu, Warn. Mem. vol. ii.p. 416. 



Penn. Brit. Zool. vol. iii. p. 122, pi. 14, female. 

 Don. Brit. Fish. pi. 26, female. 

 Flem. Brit. An. p. 170, sp. 19. 

 Jenyns, Man. Brit. Vert. p. 516, sp. 205. 

 Couch's MS. 



The Thornback exhibits very marked distinguishing 

 characters, and being also a very common fish, is one of the 

 best known of the species of Rays, — a term which Mr. 

 Couch considers to be derived from the Anglo-Saxon ' Reoh,"" 

 which means ' rough,' and is particularly appropriate to the 



