1864. ] DR. J. E. GRAY ON THE SPECIES OF SEALS. 31 
hinder edge of the ramus ascends obliquely with the notch consider- 
ably in front of the condyle (see fig. 3). 
M. Gaimard, in his ‘ Voyage to Iceland and Greenland,’ Mam- 
malia, plate 11, devotes a plate to the skull and teeth of the Seals 
of Iceland and Greenland ; but he does not pay any attention to the 
form of the lower jaw, except incidentally, when representing the 
teeth of the lower jaw of his P. annellata (t. 11. f. 9). I may ob- 
serve that this author names on his plates what we call Phoca an- 
nellata P. hispida, and what we call P. grenlandica P. annellata. 
Believing it to be desirable that the Seals, which are so difficult to 
distinguish by their external characters, should be divided into small 
sections or subgenera by organic characters, I propose to divide 
the tribe of Phocina, as defined in my Monograph (see Cat. Seals 
in the British Museum, p. 20), thus :— 
1. Branches of lower jaw diverging ; the lower edge of the lower jaw 
rounded, simple ; palate angularly arched behind ; angle of lower 
jaw blunt, sloping behind. CatLtocepuatus. C. vitulinus. 
2. Branches of lower jaw diverging ; lower edge of lower jaw di- 
lated on the inner side. 
* Palate angularly notched behind; angle of lower jaw blunt, 
sloping behind. Pacomys. P. fetidus. P.? nummularis. 
** Palate truncated behind; angle of lower jaw acute, erect 
behind, with a notch above the basal tubercle. Paco- 
pHiLus. P. grenlandicus. 
3. Branches of lower jaw arched on the side and wide apart ; lower 
edge produced on the inner side behind the symphysis ; palate 
arched. 
* Tubercle on inner edge of front part of lower jaw elongate, 
sharp-edged ; teeth moderate ; angle of lower jaw simple, 
with a distinct notch above it. Haxicyon. H. richardii. 
** Tubercle on inner edge of front part of lower jaw blunt, 
rugulose ; teeth small; angle of lower jaw with a rounded 
lobe on inner side above the basal tubercle. PHoca. P. 
barbata. 
Pacomys? NUMMULARIS. 
The lower jaws short and broad ; the grinders thick, with a broad 
thick central lobe, and nearly side by side (in the skulls of the young 
animals). 
Phoca nummularis, Temm., Faun. Jap. Mamm. Mar. p. 3. 
Hab. Japan (Temm.). 
This species is only known from some skins and three fragments 
of skulls in the Leyden Museum. 
My excellent friend Professor Schlegel, the energetic Curator of 
