72 



HAMMER-HEAD. 



two in the lower; the teeth sharp, the points inclined towards 

 the angle of the mouth, and serrated below on the concave 

 edge. The first dorsal fin sixteen inches long, but a little way 

 behind the pectorals. Pectoral eighteen inches long. The 

 second dorsal and anal opposite each other, and far behind; 

 both dorsals and anal lengthened out posteriorly; a depression 

 at the upper root of the tail. Upper lobe of the tail three 

 feet long, under lobe sixteen inches. The colour brown on 

 the back, lighter below. 



TEETH OF HAMMER-HEAD. 



1. Front teeth. 2. Side tooth ahove. 3. Side tooth below 



