Zalophus Gilliespii, _Gray_, _Ann. & Mag. N. H._ 1866, xviii. p. 231; _Allen_, _Bull. Mus. Comp. Zool._ ii. pp. 33 & 44; _Gill_, _Proc. Essex Inst._ 1866, v. p. 13. Arctocephalus (Zalophus) Gilliespii, _Peters_, _Monatsb._ 1866, pp. 275 & 671. ? Otaria Stelleri, _Schlegel_, fide _Peters_. Inhab. North Pacific, South California (Brit. Mus.); Japan (fide _Peters_). I have not seen any skull or specimens from Japan; so that I am not quite sure that the specimens from the coast of Asia are the same as those from the west coast of America. 6. NEOPHOCA. Palate concave, broad, as broad before as at the hinder part of the tooth-line, then rather suddenly contracted. The hinder nares broad, rather longer than broad, with the front edge broadly arched, which is further back than the front edge of the orbital process of the zygomatic arch, or malar bone, which is thick and flat. Fur with very little under-fur. Flap of toes moderate. Arctocephalus § _b_***, _Gray_, _Cat. Seals & Whales_, p. 57. Otaria, § Zalophus (part.), _Peters_. Neophoca, _Gray_, _Ann. & Mag. N. H._ 1866, xviii. p. 231. 1. Neophoca lobata. _Australian Hair-Seal._ Arctocephalus lobatus, _Gray_, _Spic. Zool._ 1828, t. 4. f. 2 (teeth); _Cat. S. & W._ p. 50; _Zool. E. & T. Mamm._ t. 16, 17. f. 3-5 (skull); _Gould_, _Mamm. Austr._ iii. t. 49; _Peters_. Otaria australis, _Quoy & Gaim._ _Astrol._ t. 14, 15. f. 3, 4 (skull). Arctocephalus australis, _Gray_, _Cat. Seals & Whales_, p. 57. Neophoca lobatus, _Gray_, _Ann. & Mag. N. H._ 1866, xviii. p. 231. Otaria (Zalophus) lobata, _Peters_, _Monatsbr._ 1866 pp. 276 & 671. Zalophus lobatus, _Allen_, _Bull. Mus. Comp. Zool._ ii. p. 44. The upper grinders all single-rooted, the root of the last two (the fourth and fifth) being rather compressed, with an obscure central longitudinal groove on the inner side; the first two grinders of the lower jaw with oblong, the last three with compressed roots, and the fourth and fifth with a slight longitudinal groove on the side. In the younger skulls the roots of the grinders are more oblong, less compressed, and do not show the lateral grooves, as far as the teeth can be seen without being drawn from the sockets. In the front part of the younger skull, which was received from Mr. Gould, the teeth are placed rather further back than in the adult skull from North Australia received from Capt. Grey, the hinder part of the fifth tooth being behind the back edge of the zygomatic arch. Mr. Allen thinks that this is undoubtedly the _O. cinerea_ of Desmarest, from Péron; but it is not the _O. cinerea_ of Quoy & Gaimard (see obs. on Péron’s Seal in the Cat. Seals & Whales, p. 57). Tribe V. _EUMETOPIINA._ Grinders 5/5·5/5, more or less far apart; the hinder upper behind the hinder edge of the zygomatic arch, and separated from the other grinders by a concave space.