6 



8. Delphinus Forsteri (T. 24), copied from Forster's 

 drawings the skull not known. 



b. Palate flat behind, without any lateral grooves. 



II. Clymenia. 

 Clymene, Gray, /. c. 249 ; P. Z. S. 1864, p. 237, 1866, p. 214. 



Beak of skull elongate, depressed. Teeth small, slender. 

 Nasal triangle moderate. Dorsal fin distinct. Pectoral 

 fin falcate; hand larger than the forearm-hones. Skull 

 elongate, slender ; brain-case spherical ; beak slender, elon- 

 gate, longer than the brain-case ; intermaxillaries convex. 

 Teeth small, slender, five or six in an inch. The symphy- 

 sis of the lower jaw short. The blowers are moderate. 



* Beak of the skull twice as long as the brain-case. Teeth 

 Jive in an inch. Micropia. 



1. Clymenia stenorhyncha, Gray, P.Z.S. 1866,p. 214. 

 Delphinus stenorhynchus, Gray, I. c. 396. n. 1*. D. mi- 

 crops, Gray, I. c. 240. 



** Beak of the skull once and three-quarters the length of 

 the brain-cavity. Teeth six in an inch. Euphrosyne. 



2. Clymenia microps, Gray, P. Z. S. 1866, p. 214. D. 

 microps, Gray, I. c. 240, 395 ; Zool. E. $ T. t. 25. Hub. 

 Coast of Brazil. 



3. Clymenia Alope (T.32), Gray, P. Z. S. 1866, p. 214. 



D. Alope, Gray, I. c. 252, 399. Hab. Cape Horn. 



4. Clymenia Euphrosyne (T. 22, 31), Gray, P. Z. S. 

 1866, p. 214. D. Euphrosyne, Gray, I. c. 251; Zool. 



E. §■ T. t. 22. Hab. North Sea. 



7. Clymenia Doris (T. 20). 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. 

 Gray, P. Z. S. 1866, p. 214. Tursio Doris, Gray, I. c. 

 255 ; Zool. E. §■ T. t. 20 



8. Clymenia euphrosynoides. Delphinus Euphrosyne, 

 Gray (T. 31, skull); Owen, Trans. Zool. Soc. vi. t. 8. f. 5. 



9. Clymenia dorides. 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. Gray, P. Z. S. 1866, p. 215. Tursio dorides, 

 Gray, I. c. 400. Hab. ? 



10. Clymenia obscura (T. 16, skull). 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. Gray, P. Z. S. 1866, p. 215 ; 1868, fig. . Tursio 

 obscurus, Gray, I. c. 264, 400; Zool. E. $ T. t. 16. Hab. 

 South Pacific. 



11. Clymenia similis, Gray, P. Z. S. 1868, fig. 

 Skull like C. obscura, but palate contracted behind ; side 

 of pterygoid bone keeled. Hab. Cape of Good Hope. 



III. Sotalia, Gray, I. c. 393, 401. 



Dorsal fin distinct. Beak depressed, rather longer than 

 the brain-cavity. Teeth slender, conical. Palate flat 

 behind. Pectoral fin ovate, obliquely truncated at the 

 end; hand shorter than the arm-bones. Carpal bones 

 small. 



1. Sotalia guianensis, Gray, I. c. 401 

 nensis, Gray, I. c. 257. Hab. British Guiana 



Tursio guia- 



4*. Clymenia Styx (Tab. 21). D. Styx, Gray, I. c. 

 250. Hab. West Africa. 



*** Beak of the skull once a half the length of the brain- 

 case. Teeth large, four in an inch. Gudamu. 



5. Clymenia gudamu. Delphinus gudamu, Owen, 

 Trans. Zool. Soc. vi. t. 3 (animal), t. 4 (skull). Hab. 

 India [W. Elliot). Two skulls, B. M. 



See Delphinus pomeegra, Elliot, Journ. Asiat. Soc. xvii. 

 250, xxviii. 491. 



*#** Beak of the skull once and one -half or once and one- 

 third the length of the brain-case. Teeth five or six 

 in an inch. Clymenia. 



6. Clymenia normalis. Beak of the skull once and 

 one-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. Gray, P. Z. S. 1866, p. 214. Del- 

 phinus Clymene, Gray, I. c. 249. 



IV. Delphinapterus, Gray, I. c. 276. 



Beak of skull elongate, depressed. Teeth small, slender. 

 Dorsal fin none. Bladebone very broad, nearly semi- 

 circular. 



1. Delphinapterus Peronii (T. 15, animal), Gray, I. c. 

 276. Hab. South Atlantic, New Guinea. 



V. Tursio, Gray, I, c. 254, 406; P. Z. S. 1866, p. 215. 



Beak of the skull only rather longer than the brain-case, 

 conical, convex above, rounded. Teeth large. Skull high. 

 The skull large, thick, heavy, with a high swollen brain- 

 cavity. The beak longer than the brain-case, broad, coni- 

 cal, stout, shelving on the sides. Teeth large, || or p. The 

 blower large, 

 the notch. 



Nasal triangle produced considerably before 



1. Tursio truncatus, Gray, I. c. 258, 406. no. 6 ; P.Z. S. 

 1866, p. 215. D. tursio, T. 10. f. 1. Hab. North Sea 

 and Mediterranean. 



