338 



Memoir Sears Foundation for Marine Research 



tremely short, very broadly rounded snout and smooth back (without dorsal ridge). 

 Its second dorsal is much smaller than the first and its teeth are regularly serrate on the 

 cusps, features which mark it off from A^. brevirostrisi from C. longimanus it is separated 

 by the shape of its dorsal with subacute apex, by its relatively shorter and broader pectorals, 

 and by the long interspace between the tip of its anal and its caudal, but relatively much 



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Figure 6o. Carcharhinus leucas, immature female, about 924 mm. long, from southern Florida (Amer. Mus. 

 Nat. Hist.). A Anterior part of head, about 0.3 x. B Left-hand upper and lower teeth, about 1.3 x. C Third 

 upper tooth. D Ninth upper tooth. E Second lower tooth. F Eighth lower tooth. C-F, about 2.6 x. G Right 

 nostril, about 2 x. 



Figure 6 1 . Dermal denticles of Carcharhinus leucas 

 pictured in Fig. 60, about 45 x. 



