CARCHARINUS GANGETICUS. 139 



times that of the mouth. Nostrils small, distance from the eyes; less than half 

 that from the end of the snout. Mouth large, width equal length of snout, 

 length about I of the width; labial folds at the angle, lower hidden, upper a 

 short gash toward the eye, with a short groove backward. Teeth narrow, erect; 

 serrate edged, on broad bases, in §?, If rows, median teeth small varying in 

 number from one to three rows. Gill openings less than twice as wide as the eye, 

 hindmost two above the base of the pectoral. Pectorals subfalciform, outer 

 angle produced, reaching behind the base of the dorsal, inner angle narrow, 

 rounded. Height of dorsal and length of its base about equal, origin above the 

 inner angle of the pectorals midway from end of snout to second dorsal, distance 

 between the base and the origin of the ventrals less than the length of the snout, 

 equal two fifths of the distance from the second dorsal. Second dorsal smaller 

 than the anal and extending very little farther back, origin about over middle of 

 base of anal, length of base equal to half its distance from the caudal. Anal with 

 two angles, outer blunted, hind margin deeply excavated. Caudal long, nearly 

 two sevenths of the total, depth of lower lobe nearly one third of the length, 

 blunted. Space between bases of dorsals equal, near five times the base of the 

 anal, two and one half times that of the first dorsal and more than six times that 

 of the second dorsal. 



Back brown, fins with darker edgings, except the hind margin of the pectoral 

 which is white; lower surfaces whitish. No black spots on the fins. 



Total length 3I2, snout to abdominal pores 16?, snout to fifth gill opening 7, 

 snout to mouth 2i, caudal fins 9? inches. 



Specimens described from Rio Janeiro, taken by the Hassler Expedition. 



). 



C'aRCHARINUS GANGETICUS. 



Carcharias (Prionodon) gangeticus Muller & Henlk, 1841, Plagios., p. 39, pi. 13; Dumeril, 1865, 

 Elasm., p. 359; Gunth., 1870, Cat. fishes Brit, inus., 8, p. 367; Day, 1878, Ind. fishes, p 715, 

 pi. 187. f . 1 ; Steindachner, 1900, Denk. Akad. wiss. Wien, 70, p. 519. 



Carcharias (Prionodon) japonicus Schlegel, 1850, Jap. Pisces, p. 302, pi. 133; Joru. ct Fowler, 1903, 

 Proc. U. S. nat. mils., 26, p. 614. 



Head rather short and broad. Snout very short; blunt, length about half 

 the width of the mouth, nearly equal distance between nostrils. Nostrils at 

 the edge of the snout, nearly midway in the preoral length; xalves without a 

 pointed lobe. Mouth large, curvature less than that of snout, length hartlly 

 half the width; labial fold very short, at the angles. Teeth sub triangular, 

 serrated, in 27-31 rows; upper broad, slightly oblique in front, more so toward the 

 angles, outer teeth with outer edge more indented; lower erect, narrower in the 



