69 



II. Molar teeth $ f, the posterior generally caducous in adult : canines of 

 uppejjaw greatly hypertrophied and developed as tusks; those of lower 

 jaw atrophied: incisors, except external of upper jaw, deciduous. (Ros- 

 maroidca.) 



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. 



|.t 



Zalophus Gill. 



Zalophus sensu strict. Neophoca Gray. 



.2. 



Eumetopias Gill. 

 Otaria Perou. 



Oluria sensu strict. Phocarctos Peters, Gray. 



Arctocephalus F. Cuv.=Halarctos Gill. 



Arctocephalus Gray. 



Gypsophoca Gray. 



Arctophoca Peters=JEuotaria Gray. 

 Callirhinus Gray. 



XXVI. 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 f; exceptionally!. 



PHOCINAB. (A.) 



B. Intermaxillaries terminating far from nasals. Nasal bones narrow and 

 shortened. Incisors f . 



CYSTOPHORINAE. (B.) 



II. 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 w-dest 

 toward the middle and very long. Incisors |. 



STENOB.HYNCHINAE. (C.) 



