134 Memoir Sears Foundation for Marine Research 



Africa; Eocene to Pleistocene, North America; Miocene, South America, West Indies; 

 Miocene to Pliocene, West Indies, New Zealand; Pliocene, eastern Asia. 



Species. It is probable that all published accounts of this genus, whether Pacific or 

 Atlantic, belong to a single species.' Since final conclusion must await critical comparison 

 of specimens from the two oceans, or at least comparable measurements, the Pacific refer- 

 ences are segregated below (p. 144) from those for the Atlantic and Mediterranean. 



Carcharodon carcharias (Linnaeus), 1758 



White Shark, Man-eater 



Figures 20, 21, 22 



Study Material. Jaws from specimens of about 6 feet from Long Island, New York 

 (Amer. Mus. Nat. Hist., No. 14773), 8^2 feet from Woods Hole, Mass. (U.S. Nat. 

 Mus., No. 10899) ^"d of about 12 feet from an unknown locality (Harv. Mus. Comp. 

 Zool.) ; a mounted specimen about 6 feet long from Woods Hole (in New England Mus. 

 Nat. Hist.); two fresh caught specimens, about 9 and 10 feet long, from Massachusetts 

 Bay, but not preserved; good photographs of several fresh specimens, of about 5 to 10 

 feet long, taken off the tip of Cape Cod, off Rhode Island and off Sarasota, Florida.* 



Distinctive Characters. The combination of strongly lunate caudal with very large 

 triangular and coarsely serrate teeth is diagnostic. The more rearward position of the anal 

 relative to the second dorsal and the blunter snout further separate it from its relatives of 

 the genera Isurus and Lamna. 



Description. Proportional dimensions in per cent of total length. Female, immature, 

 4,700 mm. total length,^ from Florida. 



Snout length in front of: mouth 6.3. 



Mouth: height i.i. 



Nostrils: distance between inner ends 3.8. 



Gill opening lengths: ist 9.0; 5th 9.7. 



First dorsal fin: anterior margin 12.8; length of base 9.7. 



Second dorsal fin: anterior margin 2.8; length of base 1.4. 



Anal fin: anterior margin 2.6; length of base 1.4. 



Caudal fin: upper margin 20.0; lower margin 13.5. 



Pectoral fin: outer margin 18.9; inner margin 4.6; distal margin 16.6. 



Distance from snout to : ist dorsal 37.5; upper caudal 80.O; pectoral 27.7. 



Interspace between: ist and 2nd dorsals 21.6; 2nd dorsal and caudal lO.i. 



3. Whitley (Aust. Zool., 9 [3], 1939: 240) proposes the new name albimors for the Australian Carcliaroion earlier 

 described by McCoy (Prod. Zool. Victoria, Decade *, 1885: pi. 74) as Carcharodon rondelletii. But there is noth- 

 ing- apparent, either in McCoy's account or in his measurements, or in Whitley's subsequent illustrations (Fish. 

 Aust., /, 1940: 126) to set it apart from the Carcharodon of the Atlantic. 



4. Contributed by J. W. Lowes, James Miller and Stewart Springer. 



5. From measurements by Springer (Copeia, 2, 1939: 115). 



