THE TUNNY. 
337 
feet in length, the body round, thick, and flelhy ; but 
growing flender tow'ards the tail, where it has a . angular 
fhape. The two fins on he back are each ftrengthened 
by fourteen ftrong fpines ; thofe of the firft are capable of 
being deprefled, and folding fo clofely into a fulcus in the 
back, that they become imperceptible. Behind the anal 
and fecond dorfal fin, there are a number of fmall fpu- 
rious ones both above and below. 
