FISHES OF THE PHILIPPINE ISLANDS AND ADJACENT SEAS 141 



Cynocephalus {ScoUodon) macrorhynchus Bleekee, Verb. Akad. Wet. Amster- 

 dam, vol. 18, p. 2, 1879 (China). 



Depth 7 to subcaudal origin; head 31/2, width 2. Snout 1% in 

 head, broad, depressed, flattened, as seen above rather attenuated 

 with rounded end ; eye 8 in head, 5 in snout, 4 in interorbital ; mouth 

 width 3%, gape length about %o mouth width, lower labial fold 

 very short, no upper labial fold ; upper teeth 22 rows, lower 23, cusps 

 directed obliquely outward, entire; nostrils last fourth in snout, 

 about % of eye, internarial 3 in head; interorbital 21/4, slightly and 

 broadly convex. Second and third gill openings largest, last above 

 pectoral base. Scales tridentate, median cusp longest and largest. 



First dorsal origin close behind end of depressed pectoral, front 

 fin edge l%o in head; second dorsal origin over last fourth of anal 

 base, fin length 3 in head ; anal length 2l^ ; caudal 2% in rest of body, 

 front subcaudal edge 2% in caudal length; least depth of caudal 

 peduncle 4^^ in head ; pectoral length 2, width I14 in its length ; ven- 

 tral length 3 in head. 



Back and upper surfaces dull naples yellow, with slight gray tinge, 

 lower surfaces cream color. Iris pale brown, eyeball shining white. 

 Fins all dull brownish, little deeper medially. 



Mekran, India, Ceylon, Malacca, Singapore, East Indies, Philip- 

 pines, Indo-China, China, Japan. 



A.N.S.P. No. 517. Straits of Malacca. Length, 186 mm. 



Genus APRIONODON Gill 



Aprionodon Gnx, Ann. Lyceum Nat. Hist. New York, vol. 7, pp. 400, 401, 411, 

 1862. (Tyi)e, Carcharias {Api-ioii) isoilon Miiller and Henle, orthotypic. ) 



Aprion (not Valenciennes, 1830) Mtjller and Heni^, Syst. Beschr. Plagiostomen, 

 p. 31, 1841. (Type, Carcharias (Aprionodon) hrevipinna Miiller and Henle.) 



Differs from Eulamia chiefly in its dentition, the teeth compressed, 

 edges entire and cusps narrow and nearly erect, bases broad. 



Tropical and temperate seas. Fossils known also from lower Ter- 

 tiary formations. 



ANALYSIS OF SPECIES 



a\ Snout short, wide ; first dorsal little back of inner pectoral origin ; second 

 dorsal larger than anal, origin little farther forward ; second dorsal larger 

 than anal, origin little advanced acutidens 



a'. Snout elongate, tapering; first dorsal origin above inner pectoral origin; 

 second dorsal smaller than anal, origin farther back brevipinna 



APRIONODON ACUTIDENS (Rfippell) 



Carcharias acutidens Ruppell, Neue Wirbelth., Fische, p. 65, pi. 18, fig. 3, 1835 

 (type locality: Djedda, Red Sea). — Gunther, Cat. Fishes British Mus., vol. 

 8, p. 3G1, 1870 (Seychelles). — Kltjnzingeb, Verb, zool.-bot. Ges. Wien, vol. 

 21, p. 057, 1871 (Koseir, Red Sea).— D at. Fishes of India, pt. 4, p. 713, pL 



