Fishes of the Western North Atlantic 



379 



Mouth: breadth 9.5, 10.8} height 5.0, 4.9. 



Nostrils: distance between inner ends 6.3, 6.9. 



Labial furrow length: upper 0.3, 0.3. 



Gill opening lengths: ist 4.1, 3.3} 2nd 4.2, 3.6; 3rd 3.8, 4.0; 4th 3.7, 3.7; 5th 



2.7,3.1. 



First dorsal fin: vertical height 12.7, 12.3; length of base 13.2, 12.2. 



Second dorsal fin: vertical height 4.9, 4.7; length of base 5.9, 6.4. 



Anal fin: vertical height 5.3, 5.4; length of base 6.0, 5.3. 



Caudal fin: upper margin 27.1, 29.6} lower anterior margin 13.2, 13.6. 



Pectoral fin: outer margin 21.9, 23.6; inner margin 6.4, 6.S'-, distal margin 19.6, 



20.4. 



Distance from snout to : ist dorsal 27.6, 27.95 2nd dorsal 61.0, 56.6; upper caudal 



72.9, 70.4} pectoral 22.3, 20.4; pelvics 47.7, 44-9} anal 61.4, 58.1. 



Inters-pace between: ist and 2nd dorsals 21.8, 19.95 2nd dorsal and caudal 7.0, 



7.9} anal and caudal 5.8, 5.9. 



Distance from origin to origin of: pectoral and pelvics 28.6, 28.O; pelvics and anal 



14.1, 12.2. 



UM>AAAAA=^yyu. 



Figure 70. Carcharhinus nicaraguensis, immature male, 1,511 mm. long (Harv. Mus. Comp. Zool., No. 

 35896). A Anterior part of head from below, about Yj natural size. B Right-hand nostril, about 0.8 x. 

 C Dermal denticles, about ij x. D Apical view of dermal denticle, about 1 7 x. £ Upper and lower teeth, left- 

 hand side, about 0.6 x natural size. F Third upper tooth. G Ninth upper tooth. H Second lower tooth. / Eighth 

 lower tooth. F—I, about 1.2 x. 



