6 SEALS. 
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** The front grinders of each jaw single-rooted, the rest two- 
rooted. om 
2. SrenorHyncuHus. Skull elongated; muzzle elongate; — 
grinders compressed, with three cylindrical elongated lobes, 
the centre one longest and largest. | : 
3. Lepronyx. Skull broad, depressed behind; muzzle short, — 
broad; grinders subcompressed, with a small subcentral co-— 
nical tubercle and a very small posterior one; the lower jaw — 
narrow behind, without any hinder angle; fore-feet clawed. 
4. Monacuus. Skull broad, depressed behind; muzzle short, — 
broad; orbits large; grinders small, conical, thick, with a — 
small anterior and posterior lobe; lower jaw broad, with a © 
distinct posterior angle; upper cutting teeth transversely — 
notched. 
5. OmmatTorpnoca. Skull broad, depressed behind; muzzle S 
very short, broad; orbits very large; grinders small, com- — 
pressed, with a central incurved lobe and a small lobe on | 
each side of it; fore-feet very slightly clawed. ' 
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b. Cutting teeth & ; the first grinder in each jaw single-rooted, — 
rest two-rooted ; muzzle bald, and callous between and — 
above the nostrils, and divided by a central groove ; wrist — 
rather exserted; fingers subequal; claws five, large. — 
Phocina. 
6. CALLOCEPHALUS. Muzzle rather narrow ; whiskers waved; _ 
palate angularly notched behind; toes gradually shorter; — 
web between the hind-toes hairy; hair cylindrical; under- 
fur thin. 
7. Pacopuitus. Muzzle rather produced; whiskers waved; — 
palate truncated behind; toes gradually shorter; web be- — 
tween hind-toes baldish; hair dry, flat, close-pressed, with- — 
out any under-fur. 
8. Poca. Muzzle broad, short; forehead convex; whiskers — 
smooth, simple; palate rather angularly notched behind; — 
ear-hole large ; fingers unequal, the third longest, second — 
and fourth long, the first and fifth shorter, nearly equal. 
B. Grinders with single root (except the two hinder grinders 
of Halichcerus). _ 
c. Ears without any conch ; toes simple, of fore-feet exserted, © 
of hind-feet large, the inner and outer ones large and long, 
the three middle ones shorter ; palm and soles hairy, — 
sometimes chaffy and callous from wear ; muffle havry to” 
the edge and between the nostrils. 4 
