EXTINCT MAMMALIA OF NORTH AMERICA. 415 



PINNIPEDIA. 

 PHOGID^. 



PHOCA. 



Plioca groenlandica ? 



Bones of a Seal, Jackson : Final Rep. Geol. and Min. New Hampshire, 1844, 94. Wyman : Am. 



Jour, Sc. 1850, X, note to 230. 

 Remains of a species of Seal, Leidy : Proc. Ac. Nat. Sc. 1856, 90, PL III. 

 Phoea groenlandica, Billings: Geol. Surv. of Canada, 1863, 920, 965, Figs. 493, a, b. 



Remains from quaternary formations of Maine and Canada. 



Plioca Wymani. 



Animal belonging to the Phocidce, Wyman : Am. Jour. Sc. 1850, X, 229, Figs. 1-3. 

 Phoca Wymani, Leidy : Anc. Faun. Neb. 1853, 8. 



Remains found in a miocene formation at Richmond, Virginia. 



Plioca debilis. 



Leidy : Proc. Ac. Nat. So. 1856, 265. 



Squalodon debilis. Cope : Proc. Ac. Nat. Sc. 1867, 144. 



A supposed species of Seal, indicated by three teeth, from the sands of the Ashley 

 River, South Carolina. They are all mutilated and somewhat water-worn. The 

 two larger and better specimens are represented in figures 12, 13, plate XXVIII, of 

 the present work. The crowns are short, compressed conical, with the back border 

 tuberculate, and with an internal and anterior basal ridge. The fang is single, long 

 and gibbous. 



Prof Cope suspects the teeth to belong to a Squalodon, which may be the case, or 

 perhaps they may belong to a Dolphin. 



Plioca modesta. 



Figure 14, plate XXVIII, represents a small tooth, in the collection of the Academy, 

 from the Ashley River deposits. South Carolina. The crown is compressed conical, 

 about as wide as it is high, with the apex blunt and feebly curved inwardly, with the 

 borders subacute and with a tubercle at base, the hinder tubercle being unequally 

 divided. The inner and outer surfaces are strongly grooved from summit to base. 

 The fangs are a connate pair, of which one is prolonged beyond the other. Total 

 length of the specimen five and one-half lines. The little tooth is referred to a 

 Seal, thougli it is not improbable it may belong to a Squalodont. 



LOBODON. 



liobodon vetus. 



Stenorhynchiis vetus, Leidy : Proc. Ac. Nat. Sc. 1853, 377. 



An apparently extinct species of Seal, indicated by a molar tooth, found in the 



