(1. Delphinus, Cuv).
Jaws moderately produced ; nearly of equal length : teeth more than forty on each side above and below; slender, slightly bent, pointed.
D. Delphis, Desm. Mammal, p. 514. Flem. Brit. An. p. 35. Dolphin, Penn. Brit. Zool. vol. Ell. p. 65. Shaw, Gen. Zool. vol. 11. p. 507. pi. 229.
Entire length from six to seven feet.
Body slender, thickest in the middle, gradually tapering towards the head and tail: muzzle or beak, measured from the forehead, equalling in length the rest of the head; much depressed, narrow, and somewhat pointed at the extremity: jaws nearly equal, the upper being slightly shorter than the lower: teeth very numerous, (42-42)/(42-42) to (47-47)/(47-47) = 168 to 188, slender, somewhat bent inwards, sharp-pointed; placed at equal distances from each other, and locking in between each other when the jaws are closed: eyes small, almost in a line with the mouth: blow-hole situate on the top of the head a little above the eyes: pectoral fins placed very low, in form somewhat falcate : dorsal fin pointed, taking its origin from a little beyond the middle of the back; rather elevated, and when measured along the line of flexure, equalling one-sixth of the entire length of the body: tail crescent-shaped. Skin smooth; of a dusky colour above, white beneath, and grayish on the sides.
* On this account I have introduced, in the Synoptic Arrangement of Genera, the characters of both Manatus and Stellerus Cuv., which are perhaps equally likely to occur in the British seas. At any rate they will prove useful in determining the trur genus of any of these animals which may be met with hereafter.
Met with occasionally on the British shores, but not of very frequent occurrence. Feeds on animal substances. Period of gestation said to be ten months. Produces one or two at a birth.