MAMMALS OF PENNSYLVANIA AND NEW JERSEY. 249 



Order EDENTATA ; Anteaters, Sloths, etc. 



Family Mylodontid^e ; Colpodont Ground Sloths. 



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



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



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



p. 3EI- 



1S42. Mylodon harlani Owen, Descr. Ext. Gig. Sloth, p. 15. 



1 87 1. 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^ ; Diastemodont Ground Sloths. 



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

 vol. 4, 1798 [1797 ?]» P- 248. 



Megalonyx loxodon Cope. Loxodont Ground Sloth. 



187 1. 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. 



1 87 1. Megalonyx wheatleyi Cope, Proc. Amer. Philos. Soc, xii, p. 75, 

 figs. I, 3-8. 



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

 xii, p. 83. 



1 87 1. 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. 



