PHOCIDE 605 
nails of both fore and hind feet very small and rudimentary. One 
species, M. albiventer, the Monk-Seal of the Mediterranean and 
adjacent parts of the Atlantic. 
The other genera! of this section have the same dental formula, 
but are distinguished by the characters of the cheek-teeth and the 
feet. They are all inhabitants of the shores of the southern 
hemisphere. 
Ogmorhinus.2—All the teeth of the cheek-series with three 
distinct pointed cusps, deeply separated from each other; of these 
the middle or principal cusp is largest and slightly recurved ; the 
other two (anterior and posterior) are nearly equal in size, and 
have their apices directed towards the middle one. Skull much 
elongated. One species, 0. leptonyz, the Sea-Leopard, widely distrib- 
uted in the Antarctic and southern temperate seas. 
Lobodon.2—Cheek-teeth with much-compressed elongated crowns 
and a principal recurved cusp, rounded and somewhat bulbous at 
the apex, and one anterior, and one, two, or three posterior, very 
distinct accessory cusps. One species, L. carcinophaga. 
Pwecilophoca.*—Cheek-teeth small, with simple, subcompressed, 
conical crowns, having a broad cingulum, but no distinct accessory 
cusps. One species, P. weddelli. 
Ommatophoca.>—All the teeth very small; those of the cheek- 
series with pointed recurved crowns, and small posterior and still 
less developed anterior accessory cusps. Orbits very large. Nails 
quite rudimentary on front, and absent on hind feet. The skull 
bears a considerable resemblance to that of the members of the 
next subfamily, towards which it may form a transition. There is 
one species, 0. rossi, of which very little is known. 
Subfamily Cystophorinz.—Incisors 2. Teeth of cheek-series 
generally one-rooted. Nose of males with an appendage capable of 
being inflated. First and fifth toes of hind feet greatly exceeding 
the others in length, with prolonged cutaneous lobes, and rudi- 
mentary or no nails. 
Cystophora.-—Dentition: 7 2, ¢ +, p 4, m 4; total 30. The 
last molar has generally two distinct roots. Beneath the skin over 
the face of the adult male, and connected with the nostrils, is a 
sac which, when inflated, forms a kind of hood covering the 
1 For details of these and the other genera see Mivart, Proc. Zool. Soc. 1885, 
p. 486, et seq. 
2 Peters, Monatsd. K. P. Akad. Wissensch. zu Berlin, p. 393 (1875), substituted 
for Stenorhynchus, F, Cuvier ; preoccupied for a genus of Crustacea. 
3 Gray, Zoology of Erebus and Terror, vol. i. p. 5 (1844). 
+ New name, Syn. Leptonyx, Gray, Charlesworth’s Mag. Nat. Hist. vol. i. p. 
582 (1837) ; preoccupied by Swainson, 1821. 
5 Gray, Zoology of Erebus and Terror, vol. i. p. 7 (1844). 
8 Nilsson, Faun. Scandinav, vol. i. p. 882 (1820). 
