XIV GENERA OF SEALS 453 
the shoulders and extends to the thighs. Like the other Seals 
mentioned, the young are white when first born. As may be 
inferred from its scientific name this species is also Arctic in 
range. It is also a rare visitor to these shores. . 
The genus Cystophora is the only other genus of which there 
is a British representative. It is called the Hooded Seal on 
account of an inflatable sae upon the face, with which it is said 
to attempt to terrify its enemies. The genus has an incisor less 
in each half of each jaw than Phoca and Halichoerus. — Its 
formula is I 2 while these genera are both 3. C. cristata is a 
large species reaching a length of 10 feet. The colour of the 
back is dark grey with deeper coloured spots. A few individuals 
only have been recorded from our coasts. 
Stenorhynchus (= Ogmorhinus) is an Antarctic genus. The 
hind-feet are clawless. The incisors are 3. The molars have 
an additional cusp, ze. three in all. 
The genus Leptonyx with but one species, L. weddelli, is purely 
Antarctic in range. Like the last genus it has two incisors, and 
has but rudimentary claws upon the hind-feet; the first and fifth 
toes moreover are the longest. The genus chiefly differs from 
the last in the simple conical crowns of the molars, which have 
not the additional cusps of Stenorhynchus. 
Ommatophoca is another Antarctic genus with but a single 
species, 0. rossi. In this genus the hind-feet have no claws, and 
the first and fifth toes are longer than the others. The claws of 
the fore-feet are rudimentary. The immense size of the orbits 
gives the name to the genus. There are two incisors, and the 
molars are all very small. 
Monachus is a northern genus inhabiting the Mediterranean 
and the Atlantic in the vicinity of Madeira and the Canary 
Islands. It has rudimentary nails upon both pairs of feet. 
The first and fifth toe of the hind-feet are longer than the 
others. As with the preceding genera, the incisors are two in 
each jaw. The species are MW. albiventer, the Monk-Seal, and 
M. tropicalis, the Jamaica Seal. 
Allied to Cystophora is the genus Macrorhinus, with (possibly) 
two species, of which one is Antarctic, the other frequents or 
frequented the coast of California. The incisors are two in 
the upper jaw, and but one in the lower. The premolars are 
four and the molar one; all the teeth are small and simple, but 
bs 
