172 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 



CarcJiarias (Prionodon) siamensis Steindachnee, Ann. Hofmus. Wien, vol. 11, 

 p. 229, 1896 (type locality: Mouths of Irrawaddy, Rangoon, Burma). 



EuUimia (Platypodon) platyrhynchus Gilbert, Proc. U. S. Nat. Mus., vol. 14, 

 p. 543, 1891 (type locality: Revillagigedo Islands, Lower California). 



Carcharias insularum Snydee, Bull. U. S. Fish Comm., vol. 22 (1902), p. 513, 

 pi. 1, fig. 1, 1904 (type locality: Off Diamond Head; between Molakai and 

 Oahu). 



Carcharias nesiotes Snyder, Bull. U. S. Fish Comm., vol. 22 (1902), p. 514, 

 pi. 1, fig. 2, 1904 (type locality: French Frigates Shoals; Laysan). 



Carcharias spenceri Ogilby, Proc. Roy. Soc. Queensland, vol. 23, pt. 1, p. 3, 1911 

 (type locality: Brisbane River). 



Carcharhinus spenceri Ogilby, Mem. Queensland Mus., vol. 5, p. 81, 1916 (More- 

 ton Bay, Great Sandy Straits, Old Woman Island, Hervey Bay, Rocky 

 Island Reef). — McCdlloch and Ogilby, Mem. Queensland Mus., vol. 8, pt. 2, 

 p. 128, 1925 (reference). 



Eulamia spenceri Fowler, Proc. 4th (1929) Pacific Sci. Congr., Java, p. 492, 

 1930 (compiled). 



Oaleolatnnoides spenceri Whitley, Mem. Queensland Mus., vol. 10, pt. 4, p. 198, 

 1934 (reference). 



Depth 4"% to 5 to siibcaudal origin ; head 3% to 3%? width 1% to 

 iy2. Snout 2% to 3 in head, rather wide, broad, obtusely rounded; 

 eye 12 to 14%, 4% to 4i^ in snout, 9^/2 to 10 in interorbital ; mouth 

 width 1% to 2^ in head, short labial fold at each angle; preoral 

 length 2% to 3% in head; teeth in 28 to 30 rows in jaws, subtrian- 

 gular, lower erect and narrower, all serrated; nostrils from first % 

 to last % in preoral length, each more or less subequal with orbit, 

 internarial % to ^ of preoral length; interorbital 1% to 2 in head, 

 moderately high and convex. Gill openings equidistant, third and 

 fourth longest, last 2 over pectoral base. 



Scales quindentate, with as many small keels. 



First dorsal origin opposite inner pectoral angle, well behind pec- 

 toral base, front edge li/4 to ly^ in head ; front edge of second dorsal 

 3 to 3^/^, fin length 2% to 21^, inserted trifle before anal origin; front 

 anal edge 2i/^ to 2%, fin length 2% to 2l^; least depth of caudal 

 peduncle 4% to 5; ventral length 214 o to 2i^; caudal 2^ to 3 in rest 

 of body, subcaudal 1% to 1^ in head; pectoral 314 to 31/2 in total 

 length to subcaudal origin, width 1% to 2l^. 



Gray to neutral gray above, sometimes irregularly variegated or 

 mottled darker in preserved examples. Under surfaces paler to 

 whitish. Fins often dusky towards tips, sometimes broadly pale on 

 smaller ones. Young bluish, with fins variously dusky terminally, 

 sometimes first dorsal pale apically. 



Arabia, East Africa, Cape Colony, Seychelles, India, East Indies, 

 China, Western Australia Queensland, New South Wales, Kerma- 

 dec Islands, Melanesia, Polynesia, Hawaii. Also in the Eastern 

 Pacific in California, Lower California, Kevillagegedos and Galapa- 

 gos, besides the warmer Atlantic. It includes an extensive synonymy 



