132 THE PLAGIOSTOMIA. 



of the inner extremity of the pectoral, base two fifths of the distance from the 

 second dorsal, hind margin concave. Second dorsal much smaller than the anal, 

 origin above the hindmost fourth of the anal base, acuminate end reaching half 

 way to the caudal pit and somewhat farther back than the end of the anal fin. 

 Anal farther forward than second dorsal, base equal half the distance from the 

 caudal, hind margin deeply excavated. Ventrals small, angles rounded, base in 

 front of the middle of the space between the dorsals. Caudal about one fourth 

 of the total length, angles blunted, subcaudal lol:)e hardly half the depth of the fin. 



Back brown, edges of caudal darker; lower surfaces white, edges of fins and 

 hind edge of subcaudal lobe white. 



By some authors C.fissidens Bennett, 1830, Proc. Zool. soc. Lond., p. 148, 

 is placed as a doubtful synonym of this species. 



West Indies; Brazil. 



Carcharinus sorrah. 



Carcharias {Prionodon) sorrah Mulleu & Henle, 1841, Plagios., p. 45, pi. 16; Bleeker, 1852, Verh. 



Bat. gen. 24, Plagios., p. 39; 1853, Verh. Bat. gen., 25, p. 80; Dum^ril, 1865, Elasm., p. 368; 



Kner, 1867, Nov. fische, p. 414; Gijnth., 1870, Cat. fishes Brit, mus., 8, p. 367; Day, 1878, Ind. 



fishes, p. 711, 714, pi. 185, f. 1. 

 Isoplagiodon sorrah Gill, 1861, Ann. N. Y. lye, 7, p. 410 (name only). 



Carcharias phorcys Jord. &Everm., 1903, Bull. U. S. fish, comm., 22, p. 163; 1905, ibid., 23, p. 39, pi. 2. 

 Carcharias sorrah GtJNTH., 1910, SUdsee fische, 3., p. 480. 



Snout of moderate length, broadly curved on the sides, blunt. Nostrils 

 about midway in the preoral length, greatest diameter about two thirds that of 

 the orbit, valves with a pointed lobe. Mouth medium, strongly arched, width 

 nearly equal preoral length of head. Teeth broad and inclined outward above 

 and below, in 25 rows, notched on the outer edge, with stronger denticles below, 

 the notch; serrations varying; median tooth small. Eyes moderate, diameter 

 nearly equal width of gill openings, or half the distance from the nostrils. Pec- 

 torals falciform, more than half as broad as long, reaching the end of the dorsal 

 base, outer angle sharp, hinder 90°, hind margin concave. Origin of first dorsal 

 little behind base of pectorals, base much farther from the ventrals. Ventrals 

 small, nearly opposite the middle of the space between the bases of the dorsals. 

 Second dorsal small, base above the hinder half of that of the anal. Anal twice 

 as large as the second dorsal and ending opposite that fin, hind margin deeply 

 notched, hinder angle much produced, not reaching the caudal. Caudal long, 

 nearly two sevenths of the total, pointed, subcaudal lobe deep, sharp. 



Brown, lighter below, subcaudal and pectorals blackish on the tips. 



Indian Seas; Madagascar; Borneo; Java. 



