122 THORNBACK RAY. Class IV. 



fifty-three pounds, avoirdupoise. The tail was 

 six inches long, pretty thick and round; the 

 caudal fin broad and abrupt; the head and 

 body, which were indistinct, were nearly round, 

 about two inches thick in the middle, atten- 

 uating to extreme thinness on the edges : below 

 the body, the ventral fins formed on each side 

 a quarter of a circle ; the two dorsal fins were 

 placed on the trunk of the tail. The eyes were 

 small, placed near each other j behind each was 

 a round spiracle, with six small cutaneous rags 

 on their inner circumference; the mouth small; 

 the teeth minute, spicular. The skin was every 

 where smooth; cinereous brown above, white 

 beneath. 



** With blunt Teeth. 



7. Thorn- La Raye bouclee. Belon 70. losis, cartilagine transversa 



back. Raia clavata. Rondel. 353. abdominali. Arted. Synon. 



Gesner pise. 795. Q4:. 



Steinroch. Shonevelde, 5Q. Racka. Faun. Suec. No. 2Q3. 



Thomback. Wil. Ichth. 74. La Raye bouclee. Block iehthy. 



Ruii Syn. pise. 26. iii. 60. tab. 83. 



Raia clavata. Lin. Syst. 2Q7. La Raie bouclee. He la Ce- 



Gm. Lin. 1510. pede Hist, des Poissons, i. 



Gronov. Zooph. No. 154. 128. 

 R. aculeata dentibus tubercu- 



JL HIS common fish is easily distinguished from 

 the others by the rows of strong sharp spines, 



