136 THE PLAGIOSTOMIA. 



nearer to the first dorsal than to the anal, outer angles about 90°. Caudal one 

 fourth of the total, pointed, subcaudal lobe more than half the greatest depth. 



Back brown, fin margins whitish, second dorsal with a spot of black; lower 

 surfaces whitish. 



Total length 30, snout to abdominal pores 15j, snout to fifth gill opening 7, 

 snout to mouth 2g and caudal fin 7? inches. 



Specimens a female, from Singapore, and a mature male, of 27 inches, from 

 Penang, Capt. W. H. A. Putnam. 



Indian Seas; Mauritius; Panama. 



Carcharinus acronotus. 



Squalus acronotus Poey, 1860, Memorias, 2, p. 335, pi. 19, f. 3-4. 



Platypodon acronotus Poey, 1868, Repertorio, 2, p. 450; 1876, An. Soc. Esp. hist,, nat., 6, p. 193. 



Carcharinus acronotus Jord. & Everm., 1896, Bull. 47, U. S. nat. mus., p. 36. 



Snout elongate, moderately pointed. Nostrils nearer to the mouth than 

 to the end of the snout; valves with a long sharp lobe. Eyes medium, vertical 

 diameter equal to the width of the nostrils. Teeth finely serrated, in if rows; 

 upper sub triangular, oblique, inner edges slightly sinuous, outer deeply notched; 

 lower with a broad straight base and narrower cusps in outlines resembling those 

 of Scoliodon terrae novae. Outer angle of the pectoral rather sharp, inner blunted, 

 hind margin with a shallow indentation. Origin of the first dorsal little behind 

 the inner angle of the pectoral, upper angle sharp, hinder produced, base equal 

 two fifths of its distance from the second dorsal. Hind margin of second dorsal 

 nearly straight, hinder angle produced, base opposite that of the anal. Anal 

 deeply indented on the hind margin. Subcaudal lobe sharp, subfalciform. 



Brown. 



Cuba. 



Carcharinus spallanzani. 



Squalus spallanzani Lesxteur, 1822, Journ. Acad. nat. sci., Phil., 2, p. 351. 



Carcharias (Prionodon) bleekeri Dumeril, 1865, Elasm., p. 367; Gunth., 1870, Cat. fishes Brit, mus., 

 8, p. 370; Day, 1878, Ind. fishes, p. 711, 715. 



Snout somewhat produced, preoral length nearly equal to the length of the 

 mouth, nostrils near the mid length. Teeth finely serrated, in §| rows; Upper 

 oblique, with a notch on the outer edge, inner edge straight; lower more erect, 

 cusp narrower, base broad. Pectorals twice as long as wide, front margin five 

 times the inner, fin falciform, outer angle sharp. Origin of first dorsal little 

 behind the bases of the pectorals, base nearly its length in advance of the bases 



