Muffle hairy on the edge, and between the nostrils. Ears without any conch, merely a small aperture. Arms and legs very short; wrist very short. Toes subequal, arched, exserted. Hind feet large, fan-shaped; the inner and outer toes large and long, the three middle ones shorter. The palms and soles hairy. Claws distinct, sharp. Skull:—postorbital process none or obsolete; no alisphenoid canal; the mastoid process swollen, seeming to form part of the auditory bulla. The scapula expanded upwards and backwards towards the posterior superior angle. Testicles enclosed in the body of the animal, without any external scrotum. Phocidæ, _Gray_, _Ann. & Mag. N. H._ 1869, vol. iv. pp. 268, 342, 344; _Gill_, _Proc. Essex Instit._ 1866, p. 5; _Allen_, _Bull. Mus. Comp. Zool._ ii, 1870. Sect. I. _Cutting-teeth 6/4, curved, conical, and small. The palate produced nearly to the hinder molars._ Tribe I. _PHOCINA._ Skull tapering in front. Nose-hole moderate. Molars, except the first, with two roots. Phocina, _Gray_, _Cat. Seals & Whales_, p. 20. Inhab. North Atlantic and Arctic Seas. 1. CALLOCEPHALUS. Callocephalus, _Gray_, _Cat. Seals & Whales_, p. 20. 2. PAGOMYS. Pagomys, _Gray_, _Cat. Seals & Whales_, p. 22. 3. PAGOPHILUS. Pagophilus, _Gray_, _Cat. Seals & Whales_, p. 25. 1. Pagophilus? equestris. Brown, with a ring round the head, a ring round the fore limbs, and a broad band round the middle, white. The female whitish brown, with an obscure band across the hinder part of the back. Phoca equestris, _Pallas_, _Zoog. Ross.-Asiat._ i. p. 340; _Schrenck_, _Amur-Land_, p. 182, tab. 9. figs. 1-3. Phoca fasciata, _Shaw_, _Zool._ i. p. 276 (from the Ribbon-Seal, _Pennant’s Quad._ 276). Phoca annellata, _Radde_, _Reisen im Süden von Ost-Sibirien_, 1862, i. p. 296, t. 1-3. Inhab. North Pacific. 2. Pagophilus? ochotensis. Phoca ochotensis, _Pallas_, _Zoog. Ross.-Asiat._ i. p. 117; _Schrenck_, _Amur-Land_, p. 181. Inhab. North Pacific. 4. HALICYON. Halicyon, _Gray_, _Cat. Seals & Whales_, p. 27. 1. Halicyon Richardi. Halicyon Richardi, _Cat. S. & Whales_, p. 30. Inhab. North Pacific; Columbia River. 2. Halicyon Pealei. Halichœrus antarcticus, _T. Peale_, _U. S. Expl. Exp._ Mr. Gill says that this is a typical species of _Phoca_, but appears to be identical with those that occur along the Californian and Oregonian coast, so that there must be some error as to the assigned habitat in the Antarctic seas—and proposes the name _Phoca Pealii_ (Proc. Essex Instit. vol. v. p. 4). 5. PHOCA. Phoca, _Cat. Seals & Whales_, pp. 6 & 31. Erignathus, _Gill_, 1865. 1. Phoca barbata. Phoca barbata, _Gray_, _Cat. Seals & Whales_, p. 31. Phoca lanica, _Rees_, _Cyclopædia_, PHOCA (from _Lepechin_). Inhab. North Sea. 2. Phoca naurica. Phoca barbata, _Temminck_, _Fauna Japonica_.