Delphinus Euphrosyne, _Gray_, _l. c._ p. 251; _Zool. Ereb. & Ter._ t. 22. Inhab. North Sea. *** _Beak of the skull once and a half the length of the brain-case. Teeth large, four in an inch._ Gadamu. 6. Clymenia gadamu. B.M. Clymenia gadamu, _Synops. Whales & Dolph._ p. 6. Delphinus gadamu, _Owen_, _Trans. Zool. Soc._ vi. t. 3 (animal), & t. 4 (skull). Inhab. India (_W. Elliot_). Two skulls, Brit. Mus. **** _Beak of the skull once and a half or once and one-third the length of the brain-case. Teeth five or six in an inch._ Clymenia. 7. Clymenia normalis. B.M. Clymene normalis, _Gray_, _P. Z. S._ 1866, p. 214. Clymenia normalis, _Gray_, _Synops. Whales & Dolph._ p. 6. Delphinus Clymene, _Gray_, _Cat. S. & W._ p. 249. Beak of the skull once and a half the length of the brain-case, and as long as twice and one-half the width at the notch. Teeth 40, nearly six in an inch. ***** _Beak of the skull once and one-half the length of the brain-case, and as long as twice and a half the width at the notch. Teeth five in an inch._ 8. Clymenia Doris. B.M. Tursio Doris, _Gray_, _l. c._ p. 255; _Zool. Ereb. & Ter._ t. 20. Clymenia Doris, _Synops. Whales & Dolph._ p. 6, t. 20. Clymene Doris, _Gray_, _P. Z. S._ 1866, p. 214. 9. Clymenia euphrosynoides. B.M. Clymenia euphrosynoides, _Gray_, _Synops. Whales & Dolph._ p. 6. Delphinus Euphrosyne, _Gray_, _l. c._ t. 31 (skull); _Owen_, _Trans. Zool. Soc._ vi. t. 8. f. 5. ****** _Beak of the skull once and one-third the length of the brain-case, and as long as twice and one-third the width at the notch. Teeth five in an inch._ 10. Clymenia dorides. B.M. Tursio dorides, _Gray_, _Cat. S. &. W._ p. 400. Clymene dorides, _Gray_, _P. Z. S._ 1866, p. 215. Clymenia dorides, _Gray_, _Synops. Whales & Dolph._ p. 6. Inhab. ⸺? ******* _Beak of the skull once and one-sixth the length of the brain-case, and as long as twice and one-half the width at the notch. Teeth five or six in an inch. The aperture of the blower large._ 11. Clymenia obscura. (Fig. 3.) B.M. Tursio obscurus, _Gray_, _Cat. S. & W._ pp. 264, 400; _Zool. E. & T._ t. 16. Clymene obscura, _Gray_, _P. Z. S._ 1866, p. 215, 1868, p. 147, fig. 1. Clymenia obscura, _Gray_, _Synops. Whales & Dolph._ p. 6, t. 16 (skull). Inhab. South Pacific. [Illustration: Pterygoid bones and hinder nasal opening of skull. Fig. 3. _Clymenia obscura._ Fig. 4. _Clymenia similis._] 12. Clymenia similis. (Fig. 4.)