MAMMALS OF PENNSYLVANIA AND NEW JERSEY. 249 



Order EDENTATA ; Anteaters, Sloths, etc. 

 Family MYLODONTIDJE ; Colpodont Ground Sloths. 

 1840. Genus Mylodon Owen, Zool. Beagle, p. 67. 



Mylodon missouriensis (Harlan). Harlan's Ground Sloth. 



1841. Oryctotherium missouriense Harlan, Proc. Amer. Philos. Soc., vol. 2, 



P. 3&i- 



1 84?. Mylodon harlani Owen, Descr. Ext. Gig. Sloth, p. 15. 



1871. Mylodon ? harlani Cope, Proc. Amer. Philos. Soc., xii, p. 85. 



Type locality. Benton Co., Missouri. 



Pleistocene. Port Kennedy, Montgomery Co., Penna. Ungual phalanges 

 and portion of tibia. 



Family MEGALONICHID^E ; Diastemodont Ground Sloths. 



1797? Genus Megalonyx. 'Jefferson, Trans. Amer. Philosoph. Soc., Phila., 

 vol. 4, 1798 [1797 ?], p. 248. 



Megalonyx loxodon Cope. Loxodont Ground Sloth. 



1871. Megalonyx loxodon Cope, Proc. Amer. Philos. Soc., xii, p. 74, fig. 2. 

 Type locality. Port Kennedy, 1. c. Type in Amer. Mus. N. Hist., N. Y.? 

 Pleistocene. Port Kennedy, Montgomery Co., Penna. Single superior 

 canine molar. 



Megalonyx wheatleyi Cope. Wheatley's Ground Sloth. 



1871. Megalonyx wheatleyi Cope, Proc. Amer. Philos. Soc., xii, p. 75, 

 figs, i, 3-8. 



1871. Megalonyx dissimilis Cope (not Leidy), Proc. Amer. Philos. Soc., 

 xii, p. 83. 



1871. Megalonyx sphenodon Cope, Proc. Amer. Philos. Soc., vol. xii, p. 83. 



Type locality. Port Kennedy, 1. c. Type in Amer. Mus. Nat. Hist., N. 

 York.? 



Pleistocene. Port Kennedy, Montgomery Co., Penna. Remains very 

 abundant. 



Megalonyx tortulus Cope. Cope's Lesser Ground Sloth. 



1871. Megalonyx tortulus Cope, Proc. Amer. Philos. Soc., xii, p. 84, fig. 12. 

 Type locality. Port Kennedy, 1. c. Type in Amer. Mus. Hist., N. York.? 

 Pleistocene. Port Kennedy, Montgomery Co., Penna. Canine and pos- 

 terior molars. 



