20 SEALS. 
with a single conical root; and on the right side both these 
teeth are united together in one cavity; and as there are four — 
other grinders in each side, it would appear as if there were — 
front grinders of two sets. The third, fourth, fifth and sixth of © 
the same jaw have a compressed, single, tapering root, with a — 
deep central groove nearly dividing it into two parts, the groove 
being deepest and most distinguishable on their outer side. 1n 
the lower jaw the front grinder has a double crown, with a 
thick single root, tapering below, as if formed of two teeth united 
together by their roots. The second and third grinders have a 
broad, compressed, single root, divided by a rather deep, central, 
longitudinal groove on each side, and the fourth and fifth — 
grinders each have two tapering, nearly parallel roots, well-sepa- 
rated at the base from each other. In this skull the palate is 
rounded behind, and the suture between the two bones is much 
more nearly in its centre. I do not recollect to have observed 
such a malformation, or soldering together of the roots of the 
teeth in any other beast. 
6, c. Skull and skeleton. 
The skull has the first upper and lower grinder with a single 
large subcylindrical root, tapermg to a pomt beneath, and each 
of the other grinders has two conical separate roots diverging 
nearly from the collar. The palate is broad and rather truncated 
behind, and the transverse suture between the two bones in the 
palate is rather more than two-thirds the distance from the inner 
edge of the cutting teeth. 
d. Skull. Figured Zool. Erebus & Terror, t. 8. f.3,5. Ant- 
arctic Ocean. Presented by the Lords of the Admiralty. 
These skulls differ considerably from one another in the form 
of the palate and in the teeth; but it is probable that the teeth 
of the skull (6) belonging to the skin (Zool. Ereb. & Terror, t. 8. 
f. 1, 2, 4) is a malformation. 
Subfamily 2. Phocina. Cutting teeth $; the first front grinder 
in each jaw single-rooted, rest two-rooted ; muffle bald and — 
callous between and above the nostrils, and divided by a — 
central groove ; wrist rather exserted ; fingers subequal ; 
claws 5°5, large. 
Phocina, Gray, Ann. Phil. 1825, 340; Zool. Erebus & Terror, 3. — 
Phocacéerna, § 1, Nilsson, Vet. Akad. Hand. 1837 ; Wiegm. Arch. — 
vu.; Scand. Fauna,t. , 1840. y 
Phoca, Nilsson, Vet. Akad. Hand. 1837; Wiegm. Arch. vii.; — 
Scand. Fauna, xx. 1840. . ; 
Callocephalus, F. Cuv. Mém. Mus. xi. 1827. 
