Fishes of the Western North Atlantic 295 



Scoliodon terrae-novae (Richardson), 1836 



Sharp-nosed Shark 



Figures 49, 50 



Study Material. 115 specimens, 175 to 930 mm. long, from Uruguay, Brazil, Vene- 

 zuela, Cuba, the Bahamas, Texas, Alabama, Florida, South and North Carolina, and one 

 from Grand Manan Island at the mouth of the Bay of Fundy (Harv. Mus. Comp. Zool., 

 U.S. Nat. Mus. and Bingham Oceanogr. Coll.); also two, about 316 mm. long, from 

 Ashantee, tropical West Africa (U.S. Nat. Mus., No. 42212, 42247). 



Distinctive Characters. S. terrae-novae is easily separable from such of the other 

 West Atlantic members of its family as lack spiracles and have the ist dorsal far forward, 

 by the presence of well marked labial furrows around the corners of the mouth and inward 

 along both jaws, and by its teeth. 



Description. Broad snout type. Proportional dimensions in per cent of total length. 

 Male, 522 mm., from Rio de Janeiro, Brazil (Harv. Mus. Comp. Zool., No. 160). 

 Female, 783 mm., from the Bahamas (Harv. Mus. Comp. Zool., No. 1144). 



Trunk at origin of -pectoral: breadth 9.4, 10.6; height 9.0, i i.i. 



Snout length in front of: outer nostrils 4.8, 4.0 j mouth 7.7, 7.5. 



Eye: horizontal diameter 2.4, 2.2. 



Mouth: breadth 7.3, 7.2; height 4.4, 5.3. 



Nostrils: distance between inner ends 4.9, 5.4. 



Labial furrow lengths : upper 1.8, 1.8; lower 1.6, 1.4. 



Gill opening lengths : ist 1,9, 1.9; 2nd 2.3, 2.3; 3rd 2.5, 2.4; 4th 2.3, 2.4; 5th 



1.9, 1.8. 



First dorsal fin: vertical height 8.0, 9.1 ; length of base 8.6, 9.0. 



Second dorsal fin: vevticzWiQight l.i, 2.6; length of base 2.9, 3.5. 



Anal fin: vertical height 2.5, 3.2; length of base 4.5, 5.3. 



Caudal fin: upper margin 27.8, 25.6; lower anterior margin 10.7, 11.2. 



Pectoral fin: outer margin 13.O, 14.0; inner margin 4.8, 5.1; distal margin 9.1, 



1 1.4. 



Distance from snout to: ist dorsal 29.8, 31.7; 2nd dorsal 59.8, 63.3; upper 



caudal 72.2, 74.4; pectoral 20.5, 20.6; pelvics 44.2, 46.3; anal 57.0, 60.5. 



Interspace between: ist and 2nd dorsals 21.7, 24.9; 2nd dorsal and caudal 8.1, 



7.8; anal and caudal 8.6,9.1. 



Distance from origin to origin of: pectoral and pelvics 24.4, 24.7; pelvics and 



anal 13.4, 13.3. 

 Narrow snout type. Proportional dimensions in per cent of total length. Male, 581 mm., 

 from Rio de Janeiro, Brazil (Harv. Mus. Comp. Zool., No. 412). Female, 608 mm., from 

 Rio de Janeiro, Brazil (Harv. Mus, Comp. Zool., No. 91). 



Trunk at origin of pectoral: breadth 9.2, 10.8; height 9.6, 10.3. 



Snout length in front of: outer nostrils 4.8, S-S'^ mouth 7.8, 8.6. 



Eye: horizontal diameter 2.2, 2.3. 



