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. Pectorals 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. 



^ 



f. — Front teetli. 



TEETH OF IIAMMER-IIEAD. 



2.— Side tooth al)ovc'. 3.— Side tooth helow. 



