580 DELPHINID.E. 



Several species are known ; of these two have been obtained in 

 India. 



Synopsis of Indian Species. 



Teeth about ^ ; breadth of skull more than 



half its length L. electro, p. 580. 



Teeth about | ; breadth of skull less than 



half its length L. obscurum, p. 580. 



386. Lagenorhynchus electra. The Indian broad-beaJced Dolphi 



in. 



Lagenorhynchus electra, Gray, Zooi. Ereb. Sf Terror, p. 35, pi. xiii 

 (1846) ;" Flower, P. Z. S. 1883, p. 490 ; True, Delphinidce, pp. 100, 

 173, pi. xxviii, figs. 1,2; W. Sdater, Cat. p. 321. 



Delphinus (Lagenorhynchus) fusiformis, Owen, Tr. Z. S. vi, p. 22, 

 pi. v, fig. 1, pi. vii. 



A short and broad beak. Dorsal and pectoral fins falcate. 

 Snout broad. Teeth about ||, conical, curved inwards, about i inch 

 in diameter, confined to the anterior two thirds of the rostrum and 

 less than half the mandible. Kami of mandible deep in the pos- 

 terior half and slender in front. 



Colour. Dark above, darkest on the dorsal fin, the fore part of 

 the pectoral and caudal fin, and the snout ; ashy grey unspotted 

 below (Owen). But a specimen of the same species from the 

 Pacific is described as blue-black, with a white spot in front of each 

 pectoral fin, a frontal band of light slate-colour, vent and abdomen 

 reddish white. 



Dimensions. An adult female measured 6 feet long, snout to 

 pectoral fin 19^ inches, to dorsal 31, length of pectoral fin along 

 front margin 12, of dorsal 10. Basal length of skull 17, breadth 

 across orbits 9'5, length of rostrum 9'75, breadth of same at 

 base 5-4. 



Distribution. Indian and Tropical Pacific Oceans. Obtained at 

 Vixagapatam by Sir W. Elliot. 



387. Lagenorhynchus obscurum. TJie beaJcless Dolphin. 



Delphinus obscurus, Gray, Spic. Zool. p. 2 (1828); id. Zool. Ereb. 8f 



Terror, p. 37, pi. xvi ; Blyth, Cat. p. 90. 

 Lagenorhynchus obscurus, True, Delphinidee, pp. 104, 174, pi. xxix, 



figs. 1, 2. 

 Prodelphinus obscurus, Flower, List Cetacea B. M. p. 28 (1885) ; 



W. Sdater, Cat. p. 324. 



No distinct beak, the head sloping gradually down to the upper 

 lip. Fins falcate. Teeth about g, small, less than inch in 

 diameter, curved inwards, those in the upper jaw occupying about 

 I of the rostrum. Skull and rostrum much narrower than in 

 L. electra, and intermediate in form between those of that species 

 and those of Delphinus. 



