STENO. 583 



^ of its length. Pterygoids in contact along the median line. 

 Mandible with its inferior border very convex at the symphysis, 

 which is very long, fully 3 the ramus. 



Colour. In an Atlantic specimen the upper parts and fins were 

 purplish sooty black ; sides marked with rather large stellate white 

 spots. Snout and under surface of body white, more or less tinged 

 with purple and rose-colour and marked with prominent purple 

 spots (Liitken). The colour of Eastern specimens has nob been 

 recorded, and there may be much variation. 



Dimensions. Total length 8 ft. 6 in. ; snout to dorsal fin 44 

 inches, to pectoral 25. Length of a large skull 19-5, of rostrum 

 11'5; breadth of skull between orbits 7, greatest breadth 8-5. 



Distribution. Indian and Atlantic Oceans. Found in the Bay of 

 Bengal ; a specimen having been captured near the Nicobar 

 Islands. 



390. Steno plumbeus. The plumbeous Dolphin. 



Delphinus plumbeus, Dussumier, Ciiv. Reyne An. e"d. 2, i, p. 283 

 (1829) ; Pucheran, Rev. Mag. Zool. (2) viii, 1856, pp. 146, 315, 362, 

 449 ; Jerdon, Mam. p. 157. 

 Sotalia plumbea, Flower, P. Z. S. 1883, pp. 489, 513 ; True, Delphin- 



idce, pp. 21, 153, pi. i, figs. 1, 2 ; W. Sclater, Cat. p. 325. 

 La-maing, Burmese. 



Snout very long ; dorsal fin long and but little elevated ; pec- 

 toral limbs short, about \ total length ; caudal ridges prominent. 



Teeth about || (37 on each side of upper jaw, 34 on each side of 

 lower). Eostrum more than f length of skull ; its breadth at the 

 middle ^ its length. Pterygoids not in contact. Symphysis of 

 mandible one third length of jaw. 



Colour. Uniform plumbeous grey, except on the extremity and 

 underside of the lower jaw, where it is white. 



Dimensions. Total length 7 ft. 9 in. ; tip of snout to dorsal fin 

 34 in., to pectoral 23; length of anterior margin of dorsal fin 17, 

 of pectoral 14 ; expanse of tail-flukes 22. Skull 22 inches long, 

 beak 13-75, breadth of skull between orbits 7'5. 



Distribution. Indian Ocean. Eecorded from Madras, Ceylon, 

 the Malabar coast, and Karachi, and said to be common in tidal 

 estuaries in Burma. 



391. Steno perniger. Elliot's Dolphin. 



Delphinus perniger, Elliot, Blyth, J. A. S. B. xvii, pt. 1, p. 250 ; 



Blyth, Cat. p. 91 ; Jerdon, Mam. p. 157. 

 Delphinus (Steno) gadamu, Owen, Tr. Z. S. vi, p. 17, pis. iii, iv 



Sotalia gadamu, Flower, P. Z. S. 1883, pp. 489, 513 ; True, Delphinidai 



pp. 13, 154, pi. ii, figs. 1,2; W. Sclater, Cat. p. 325. 

 Tursiops perniger, W. Sclater, Cat. p. 323. 

 Gadamu, Telugu. 



