“The atlas, axis, and three other cervicals are anchylosed. The compound cervicals have a conjoined length of 4 inches. Vertical diameter of foramen magnum 2½ inches. Conjoined length of the four lumbers 8 inches; height, including spinous processes, 8·5 inches. Caudal apparatus, of thirteen segments, 16 inches; two of these are anchylosed. Teeth 9-9/8-8”.—_Hector._ 6. Globiocephalus Scammonii, _Cope_, _Proc. Ac. N. S. Philad._ 1869, p. 11. Black above and below. Inhab. North Pacific. 7. Globiocephalus australis. Inhab. Coast of Australia. In Museum of Sydney. 8. Globiocephalus indicus, _Gray_, _Cat. S. & W._ p. 322. Inhab. Bay of Bengal. Black fish. 9. Globiocephalus Sieboldii, _Gray_, _l. c._ p. 323. Inhab. Japan. 10. Globiocephalus chinensis, _Gray_, _l. c._ p. 323. Inhab. China. 11. Globiocephalus sibo, _Gray_, _l. c._ p. 323 (_sub_ G. Sieboldii). Inhab. Japan. Called “Sibo golo.” Purple, with a white spot behind the dorsal fin. 2. SPHÆROCEPHALUS. Sphærocephalus, _Gray_, _l. c._ p. 323; _Synops. Whales & Dolph._ p. 9. Palate of the skull convex, shelving on the sides. Beak oblong, of nearly the same width the greater part of its length. 1. Sphærocephalus incrassatus. B.M. Sphærocephalus incrassatus, _Gray_, _l. c._ p. 324, figs. 63 & 64; _Synops. Whales & Dolph._ p. 9. Inhab. British Channel, Bridport. II. _Pectoral fin broad, rounded or truncated at the end; hand shorter than the arm-bones; second finger the longest, the rest gradually shorter; phalanges of the second finger six or eight_ (cf. p. 63). Family 13. ORCADÆ. Orca, _Gray_, _Cat. Seals & Whales_, p. 278; _Synops. Whales & Dolph._ p. 8. Head rounded, scarcely beaked. Dorsal fin falcate. Skull heavy; wings of sides expanded; beak short, broad; triangle in front of the blowers flat. Lower jaw thick in front; symphysis short. Teeth large. [Illustration: Fig. 7. _Orca stenorhyncha._] [Illustration: Fig. 8. _Orca capensis._] [Illustration: Fig. 9. _Orca stenorhyncha._] [Illustration: Fig. 10. _Orca capensis._] Vertebræ 51 or 52:—C. 7. D. 11 or 12. L. and C. 33. The first three cervical vertebræ united into one mass by their bodies and dorsal processes, the rest more or less free. Pectoral fin broad and rounded at the end. “Carpal bone single, in a large mass of cartilage.” 1. ORCA. Orca, _Gray_, _P. Z. S._ 1870, p. 70. Beak of the skull from the notch before the orbit the same length as from the notch to the condyles; the width at the notch three-fifths of the length of the beak. The occipital end of the skull slightly concave. Condyles of moderate size. Lower jaw broad on the sides, very thick and solid in front. A. _The beak of the skull tapering and narrow in front, end narrow._ Gladiator. 1. Orca stenorhyncha. (Figs. 7 & 9.) B.M.