346 Memoir Sears Foundation for Marine Research 



Red Sea Reference, Probably Not leucas: 



Carcharkinus commersonii Gudger, Bull. Amer. Mus. nat. Hist., 75, 1937: 264 (photos of teeth, prob. from 

 Gulf of Aden). 



Not Carcharias leucas Bennett, Proc. zool. Soc. Lond., 1859: 223 (N. Zealand).*" 



Not Carcharinus flatyodon Garman, Mem. Harv. Mus. comp. Zool., 36, 1913: pi. 3, fig. 1-4 (this is a 

 milberti, mislabelled). 



Not Eulamia flatyodon Fowler, Proc. Acad. nat. Sci. Philad., yi, 1919: 146 (a Jamaica spec, not leucas be- 

 cause teeth narrow and the lowers entire ; perhaps macuUpnnis) . 



Not Carcharkinus commersonii Rey, Fauna Iberica Feces, j, 1928: 342 (this is obscurus, see p. 342). 



Carcharkinus limbatus (Miiller and Henle), 1 841 



Small Black-tipped Shark 



Figures 62, 63 



Study Material. Female, 990 mm. (about 3 feet 3 inches) long, from Florida (Amer. 

 Mus. Nat. Hist.) ; also 14 specimens, 460 to 621 mm. long, from Galveston, Texasj" one, 

 585 mm., from Pine Island, Floridaj 3 embryos, 351 to 398 mm., from Captiva Key, 

 Florida (Harv. Mus. Qjmp, Zool.). 



Distinctive Characters. Among smooth-backed members of the genus in the Atlantic, 

 limbatus falls with maculifinnis (p. 364) in the conspicuously black-tipped fins. But it is 

 easily distinguishable from the latter by its relatively larger eyes, its shorter gill openings 

 and upper labial furrow, and by the more obtuse free rear tip of its second dorsal j also, the 

 edges of its lower teeth, as well as those of the uppers, are regularly, though very finely, 

 serrate, and its first dorsal usually originates somewhat farther forward relative to the 

 pectorals. 



Description. Proportional dimensions in per cent of total length, Male, 621 mm., 

 from Galveston, Texas (Harv. Mus. Comp. Zool., No. 35842). Female, 990 mm., from 

 Florida (Amer. Mus. Nat. Hist.). 



Trunk at origin of pectoral: hrezdth 11.4, 10.4; height 12.6, 12.3. 



Snout length in front of: outer nostrils 3.5, 3.3; mouth 7.9, 7.9. 



Eye: horizontal diameter 1.5, 1.5. 



Mouth: breadth 9.0, 8.95 height 4.8, 4.7. 



Nostrils: distance between inner ends 5.4, 5.2. 



Labial furrow length: upper 0.8, 0.8. 



Gill opening lengths: ist 4.3, 3.65 2nd 4.5, 3.95 3rd 4.7, 4.1 j 4th 4.2, 3.8} 5th 



3.6, 2.9. 



40. As leucas was preoccupied, the name brachyurus was substituted by Giinther (Cat. Fish. Brit. Mus., 8, 1870: 369) 

 for this Indo-Pacific species, which differs from the Atlantic leucas in a more pointed snout, and in that its first 

 dorsal originates considerably farther back. It is classed as a synonym of lamia, i.e., longimanus, by Fowler 

 (Bull. U.S. nat. Mus., 100 [/j], 1941: 171)) but differs equally sharply from the latter in its angular first 

 dorsal, in its much shorter pectoral, and in that the tip of its anal is far in advance of the origin of its caudal. 

 For photograph, see Whitley (Fish. Aust., i, 1941: 102, fig. 97). 



4.1. Contributed by J. L. Baughman. 



