326 



Memoir Sears Foundation for Marine Research 



Labial furrow length: upper 0.8, 0.7. 



Gill ofening lengths: ist 2.5, 2.9; 2nd 2.7, 3.O5 3rd 2.7, 3.2; 4th 2.5, 2.9; 5th 



2.3,2.5. 



First dorsal fin: vertical height 8.2, 9.9; length of base 9.5, 9.7. 



Second dorsal fin: vertical height 3.0, 2.9; length of base 3.7, 4.1. 



^««/^«; vertical height 3.9, 3.85 length of base 4.5, 5.0. 



Caudal fin: upper margin 28.3, 27.4 j lower anterior margin 1 1.7, 1 1.6. 



Pectoral fin: outer margin 15.6, 14.85 inner margin 6.0, 5.6; distal margin 11. 1, 



12. 1. 



Distance from snout to: ist dorsal 29.7, 32.4; 2nd dorsal 60.8, 61.35 upper caudal 



71.7, 72.6; pectoral 21.4, 21.9; pelvics 45.6, 47.25 anal 60.2, 60.6. 



Interspace between: ist and 2nd dorsals 22.4, 21. 1 5 2nd dorsal and caudal 7.2, 



7.45 anal and caudal 6.5, 7.2. 



Distance from origin to origin of: pectoral and pelvics 24.5, 27.0 5 pelvics and anal 



15.1,13.8. 



l^A^cLAAAA^^^^^ 



Figure 55. Carcharhinus acronotus, immature female, 637 mm. long, from Englewood, Florida (U.S. Nat. 

 Mus., No. 104331). A Anterior part of head from below, about 0.4. x. B Dermal denticles, about 23 x. C Api- 

 cal view of dermal denticle, about 46 x. D Left-hand upper and lower teeth, about 1.5 x. £ Third upper tooth. 

 F Eighth upper tooth. G Third lower tooth. H Eighth lower tooth. E-H, about ^ x. I Left-hand nostril, 

 about 2 X. 



Trunk moderately stout, its height at origin of ist dorsal (where highest) about Vs 

 its length to origin of caudal, back smooth, without mid-dorsal ridge. Body sector to cloaca 

 a little shorter than tail sector. Caudal peduncle only slightly compressed laterally. Lower 

 precaudal pit strongly marked, similar to upper. Dermal denticles mostly overlapping. 



