56 SPINOUS SHARK. 



waved, and widest at the middle; the lower lobe rounded and 

 obsolete. On the back the colour dark; lighter, with tints of 

 blue, along the upper sides and tail; yellow with reddish tints 

 on the belly; the fins edged with reddish flesh-colour. There 

 are no spines on the snout and fins, and those on the body are 

 nearly straight, 



Mr. Fox describes these spines as being tubercles with re- 

 curved points, and as such they are represented in Mr. Yarrell's 

 engraving. Lacepede says they are tubercles of unequal size, 

 large and round at the base, as in the Thornback Ray, with 

 one or two crooked points to each; and Risso's description 

 expresses nearly the same thing, but he represents the second 

 dorsal fin as of very small size. 



