146 BULLETIN 10 0, UNITED STATES NATIONAL MUSEUM 



large cusp, lower teeth entire and narrower; nostrils about last 

 % in preoral length, valve with small pointed lobe, internarial 1% 

 in preoral length or about equals mouth cleft; interorbital 2% ii^ 

 head, low. Gill openings equidistant, last smallest and last 2 above 

 pectoral base. 



Scales minute, with 3 to 5 keels and as many points behind. 



First dorsal origin above inner pectoral angle, front fin edge 1% 

 in head; second dorsal smaller than anal, origin above last third 

 of anal base, fin length 2% in head ; anal length 2^/4 ; least depth 

 of caudal peduncle 5i/^ ; pectoral 1%, width ly^ its length ; ventral 

 length 2% in head, clasper slender, little longer than fin; caudal 

 2% in rest of body, subcaudal 214 in caudal. 



Gray-brown, whitish below. (Miiller and Henle.) 



Mekran, India, East Indies, New South Wales. Also Chile in the 

 Eastern Pacific. According to Dumeril the type is 660 mm. long. 



HYPOPRION HEMIODON (Muller and Henle) 



Carcharias (Hypoprion) hemiodon (Valenciennes) Mullee and Heinle, Syst. 

 Beschr. Plagiostomen, p. 35, pi. 19, tig. 12, 1841 (teeth) (type locality: 

 Pondicherry). — Bleeker, Verb. Batav. Genootsch. (Bengal), vol. 25, p. 80, 

 1853 (reference).— DtJMEEiL, Hist. Nat. Elasmobr., vol. 1, p. 351, 1865 

 (types). — Meyer, Anal. Soc. Espan. Hist. Nat, Madrid, vol. 14, p. 48, 1885 

 (North Celebes; Manila Bay, Luzon). 



Carcharias hemiodon GiJNTHEB, Cat. Fishes British Mus., vol. 8, p. 362, 1870 

 (India, Calcutta ) .—Day, Fishes of India, pt. 4, p. 714, 1878 (India, Hooghly 

 at Calcutta). — Macleay, Proc. Linn. Soc. New South Wales, vol. 2, p. 366, 

 1878 (Port Darwin).— DAY, Fauna Brit. India, Fishes, vol. 1, p. 12, 1889.— 

 BoiTLENGEK, Proc. Zool. Soc. London, 1889, p. 243 (Muscat). — Eleea, Cat. 

 Fauna Filip., vol. 1, p. 613, 1895 (Luzon, Manila Bay). — Zugmayer, Abh. 

 Bayer. Akad. Wiss., math.-phys. Kl., vol. 26, p. 8, 1913 (Oman). — Weber, 

 Siboga Exped., Fische, vol. 57, p. 590, 1913 (Dania and northwest Waigiu). — 

 Tirant, Service Oc^anogr. Peches Indo-Chine, 6^ Note, p. 79, 1929 (Saigon 

 River to Thudaumot). 



Squalus (Hypoprion) hemiodon Gray, List Fish British Museum, p. 43, 1851 

 (Pondicherry). 



Hypoprion henviodon Garman, Mem. Mus. Comp. Zool., vol. 36, p. 122, 1913 

 (Pondicherry, India, Calcutta). — Waite, Rec. South Australian Mus., vol. 2, 

 p. 12, 1921 (not fig. 9).— FowLEH, Mem. Bishop Mus., vol. 10, p. 21, 1928 

 (compiled) ; Proc. 4th (1929) Pacific Sci. Congr., Java, p. 493, 1930 (refer- 

 ence). — Cheivey, Inst. Oc^anogr. Indochine, 19* note, p. 6, 1932 (Cochin- 

 china). — WHiTurr, Mem. Queensland Mus., vol. 10, pt. 4, p. 198, 1934 (ref- 

 erence). — Roxas and Martin, Dept. Agr. Comm. Manila Techn. Bull. 6, 

 p. 13, 1937 (reference). 



Snout moderate, blunt, much shorter than in Hypoprion macloti; 

 teeth in 29 to 32 rows above, 29 to 27 below; upper subtriangular, 

 slightly oblique, smooth on inner edge, notched on outer and with 

 several blunt denticles on basal portion; lower not or serrated only 

 on outer basal portions, cusps narrower, on broad bases, nearly erect ; 



