69 
II. Molar teeth 5 §, the posterior generally caducous in adult: canines of 
upper jaw greatly hypertrophied and developed as tusks; those of lower 
jaw atrophied: incisors, except external of upper jaw, deciduous, ( Ros- 
maroideda. ) 
A. Form comparatively etypical, with the hinder legs flexible forwards. 
Ear conchs obsolete. Skull with the mastoid processes strong and 
salient; the surface continuous with the auditory bullae ; no postorbital 
processes; distinct alisphenoid canals. Anterior limbs about as large 
as posterior; feet with the toes decreasing in a curved line, destitute of 
claws: posterior feet with the five digits scarcely increasing toward 
inner; all provided with claws. 
ROSMARIDAE. (XXVII.) 
SUPER-FAMILY PHOCOIDEA. 
XXV, OTARIIDAE. 
Genera. 
o. 1; 
Zalophus Gill. 
Zalophus sensu strict. Neophoca Gray. 
§. 2 
Eumetopias Gill. 
Otaria Peron. 
Olaria sensu strict. Phocarctos Peters, Gray. 
Arctocephalus IY. Cuv.=Halarctos Gill. 
Arctocephalus Gray. 
Gypsophoca Gray. 
Arctophoca Peters=Euotaria Gray. 
Callirhinus Gray. 
XXXVI. PHOCIDAE. 
SUB-FAMILIES. 
I.. Maxillar zygomatic process with the posterior surface subvertical or very 
oblique. Malar oblong-rhomboid, emarginated above and below. 
A. Intermaxillaries narrow, prolonged, and wedged behind between the 
supramaxillaries and nasals. Nasal bones narrow, diminishing in 
width backwards. Incisors $; exceptionally 4. 
PHOCINAE,. 
B. Intermaxillaries terminating far from nasals. Nasal bones narrow and 
shortened. Incisors ¢. 
CYSTOPHORINAE. 
IJ. Maxillar zygomatic process with its lower and posterior surface extended 
horizontally backwards, and its angle continued far behind along the inner 
side of the malar. Malar elongated, bow-shaped, and curved upward in 
front. 
A. Intermaxillaries narrow, not continued backward between nasals and 
supramaxillaries. Nasal cavity expanded, with the nasal bones widest 
toward the middle and very long. Incisors 4. 
STENORHYNCHINAE, 
(A) 
(B.) 
(C.) 
