70 



A. PIIOCINAE. 

 |.-1. 



Phoca Linn., Gill= Callocephalus F. Cuv., Gray. 



Callocephalus Gray. Halicyon Gray. 



Pagomys Gray. 

 Pagophilus Gray. 

 Erignathtfs Gill=PAoca Gray, not Linn. 



J.2. 



Halichoerus Nilss. 



5.8. 



Monachus Flem.=Pelagios F. C\iv.=Heliophoca Gray. 



B. CYSTOPHOKINAB. 



Cystophora ~Nilss.=Stemmatopus F. Cuv. 



Macrorhinus F. Cuv.isJ/jVoun^a Gray=.Macror^na Gray=il/orun<7a Gray. 



C. STENOKHYNCHINAB. 



Lobodon Gray. 

 S tenor hynchus F. Cuv. 



Leptonychotes=Leptonyx Gray, not Sw. 1821. 

 Ommatophoca Gray. 



Extinct Phocidaef 

 Pachyodon Meyer. 

 Pristiphoca Gerv. 



SUPER-FAMILY ROSMAROIDEA. 

 XXVII. ROSMARIDAE. 



Single genus. 

 Rosmarus Scop.=0dobaenus (Briss.) ll\.=Trichechus auct. pi., not Linn. 



Extinct Rosmaridae. 

 Trichechodon Lankester. 



UNGTTLATA. 



SUB-ORDERS. 



I. Digits paired, the third and fourth being subequally developed and ex- 

 serted; (the fifth, generally, nearly corresponding in size and position to 

 the second, and, generally, developed or atrophied in nearly equal 

 degree ;) the articulating phalanges and proximal carpal and tarsal bones 

 correspondingly modified. Astragalus with its anterior or inferior articular 

 surface divided by a crest into two sub-equal facets. Femur without 

 a third trochauter, and with its shaft generally perforated at the fore and 



