42 MAMMALIA CETACEA. [DELPHINUS. 



than the upper : teeth numerous ; from twenty-two to twenty-five in each 

 jaw on each side, compressed, and nearly straight : eyes small, almost in 

 a line with the mouth : blow-hole crescent-shaped, with the concavity 

 directed forwards: pectoral fins placed low down, oval, and somewhat 

 pointed : dorsal fin straight, triangular, rather beyond the middle of the 

 body. Skin smooth; dusky on the back, whitish on the belly, the two 

 colours meeting on the sides. 



A constant inhabitant of the British seas, often entering the mouths 

 of rivers. Preys on mackarel, herrings, and other fish. A specimen 

 which occurred in the London market in May 1833 was found to contain 

 a full-formed foetus; it is probable, therefore, that they produce their 

 young at about that period of the year. 



66. D. Orca, Fab. (Grampus.) Upper jaw projecting 

 a little beyond the lower : teeth about eleven on each side 

 above and below ; conical, bent at the summits : pectoral 

 fins broad and oval. 



D. Orca,Flem.Brit. An. p. 34. D. Grampus, Desm. Mammal, p. 517. 

 Grampus, Hunter in Phil. Trans. 1787, pi. 16. 



DIMENS. Entire length from twenty to twenty-five feet. 



DESCRIPT. Much larger than the last species; the body deeper and 

 thicker in proportion to its length. Snout very short and obtuse : upper 

 jaw somewhat longer than the lower, but this last broader than the 

 upper : teeth unequal, conical, a little bent at the summits ; varying in 

 number according to the age of the individual, generally about twenty 

 two in each jaw: eyes almost in the same line with the mouth: dorsal 

 fin nearly in the middle, very much elevated, and pointed at the extre- 

 mity : pectorals very broad, of an oval form : tail crescent-shaped. Skin 

 smooth ; glossy black above, white beneath, the two colours meeting on 

 the sides but separated by a well-defined line ; an oval white spot behind 

 each eye. 



Inhabits the British seas in large herds, and occasionally enters rivers. 

 Is of a fierce and voracious disposition, preying upon the larger species of 

 fish. Obs. The Delphinus Gladiator and the D. ventricosus of Lace- 

 pede, two species constituted by that author from individuals taken in the 

 Thames, are considered by Cuvier as not really distinct from the above. 



67- D. melas, Traill. (Casing Whale.) Top of the 

 head very convex : teeth conical, varying in number : pec- 

 toral fins long and narrow. 



D. melas, Traill in Nichol. Journ. vol. xxn. p. 81. Flem. Brit. An. 



?. 34. D. globiceps, Cuv. Ann. du Mus. torn. xix. p. 14. pi. 1. 

 2, 3. D. Deductor, Scoresby, Arct. Reg. vol. i. p. 496. pi. 13. 

 f. 1. 



DIMENS. Entire length from twenty to twenty-four feet. 



DESCRIPT. Equalling the Grampus in size, but differing essentially 

 from that species in the form and character of the fins ; the dorsal much 

 shorter, the pectorals longer, narrower, and more pointed : head short and 

 round, with the forehead remarkably convex and prominent: upper jaw 

 projecting a little beyond the lower : teeth conical, sharp, and a little 

 bent: varying much in number in different individuals, not visible in 



