134 THE PLAGIOSTOMIA. 



Carcharinus amboinensis. 



Carcharias {Prionodon) amhoumnsU Mui-leu & Heni.e, 1841, Tlagios., p. 40, pi. 19, f. 4; Gunth., 1870, 

 Cat. fishes Brit, raus., 8, p. 372. 



This species differs from C. milherti principally in the form of the teeth and 

 the pectoral fins. Snout obtusely rounded. Teeth moderate, subequal in form 

 and size in the two jaws, broad, triangular, serrated, in 25 rows. The upper are 

 slightly oblique, the lower more erect, the laterals have greater indentation on 

 the outer edge, and the median are shaped like the larger ones at each side of 

 them but are very small and the lower one is not serrated. Pectorals longer than 

 those of C milherti, with sharp outer and rounded hinder angles, and with hind 

 margins deeply indented. 



Grey; lighter below. 



Amboina. 



Carcharinus melanopterus. 



Carcharias melanopterus QuoY & Gaimard, 1824, Voy. Uran., Poiss., p. 194, pi. 43, f. 1, 2; RItppell, 1835, 

 Neue wirb. Abyssinien, Fische, p. 63; Gijnth., 1866, Fishes Zanzibar, p. 142; Klunzinger, 1871, 

 Syn. fische, 2, p. 218; Jord. & Everm., 1905, Bull. U. S. fish, comm., 23, p. 38, pi. 1; Jord. <fe 

 Seale, 1906, Bull. U. S. fish, comm., 25, p. 182; GOnth., 1910; Sudsee fische, 3, p. 480. 



Carcharias {Prionodon) melanopterus Muller & Henle, 1841, Plagios., p. 43, pi. 19, f. 5; Bleeker, 

 1852, Verh. Bat. gen., 24, Plagios., p. 33; Dumeril, 1865, Elasm., p. 305; GtJNTH., 1870, Cat. 

 fishes Brit, mus., 8, p. 369; Day, 1878, Ind. fishes, p. 715, pi. 185, f. 3. 



Carcharias (Prionace) melanopterus T. Cantor, 1849, Malay fishes, p. 400. 



Carcharias {Prionodon) henlei Bleeker, 1853, Nat. tijds. Ned. Ind., 4, p. 507. 



Carcharias {Prionodon) brachyrhynchus Bleeker, 1854, Act. Soc. sci. Ind. Neerl., 6, p. 206; Dumeril, 

 1865, Elasm., p. 364. 



Carcharias melanopterus Fowler, 1901, Proc. Acad. nat. sci. Phil., p. 325. 



Head less than one fourth of the total, broader than deep; snout short, 

 length about equal to width of mouth, broad, broadly rounded from the eyes. 

 Nostrils little nearer to end of snout than to mouth. Mouth wide, length about 

 two thirds of the width. Teeth serrated, in §1 to It rows, broad-based; upper 

 cusps wider, inner edge oblique, straight, outer deeply notched; lower cusps 

 narrower, more erect, nearly or quite smooth in young, median and one at each 

 side of it smaller. Labial folds very short, at the angle, with a short groove 

 toward the eye. Eyes small, front edges above the front edge of the mouth, 

 length of orbits little less than their distance from the nostrils, about equal the 

 width of the gill openings. Two gill openings above the bases of the pectorals. 

 Pectorals falciform, outer angle sharp, inner rounded, width less than half the 

 length, extending behind the base of the dorsal, hind margin concave. Origin 

 of the dorsal above the inner angle of the pectoral, end hardly reaching a vertical 

 from the ventral, inner angle produced, hind argin mdeeply concave, base two 



