222 



MAMMALS. 



Species. 



Megatherium — 



Cuvieri {continued). 



Locality. 



FOKMATION IN WHICH RE- 

 MAINS FOUND. 



Megatherium mirabilo 

 Leidy 



Megalonyx Jeffersoni Cu 



Megalonyx dissimilis Leidy 

 Megalonyx gracilis, Lund 



Mylodon Darwinii, Owen 

 Mylodon robustus, Owen 

 Mylodon Hailanii, Owen 



Ereptodon priscus Leidy 

 Gnathopsis Oweui Leidy 



Bed of Salado, near Buenos Ayres Pliocene 

 (1831) 



Lower bed of cliif called Puenta Pliocene (out of 23 shells 



Alta at Baliia Blanca, — clitf com- 

 posed of cemented quaitzoze shin- 

 gle (Darwin, 183-t) 



Uiver Luxan near Buenos Ayres 

 (1837) 



Las Averias, an estate north of the 

 Rio Salado (1838) 



Skiddaway Island, Georgia (1834) 



White Bluff, Savannah in Georgia 



Ashley River, in South Carolina 



White Cave, Tennessee 



Blue Ridge, Western Virginia 



Big Bone Cave, White County, 

 Tennessee 



Memphis, Tennessee 



Natchez 



Alabama 



Kentucky, Virginia 



Natchez 



Caves of Brasil, and superficial de- 

 posits, to the Straits of Magellan 



Southern parts of South America 



La Plata 



Mammoth Rarine, Mississippi 



Ashley River, South Carolina 



Williaraette or MuUonah River, a 

 tributary of the Columbia, Ore- 

 gon 



Benton Co., Missoui-i 



Bigbone Lick, Kentucky t 



Natchez 



Mississippi 



South America 



from same bed, 12 to 16 

 recent) 



Pliocene 



' Pleistocene Marl "* 



Disputed 



)» 

 Pleistocene 

 Pliocene 

 Pleistocene 



Pliocene 



Unknown 



Pliocene 



Miocene or Pliocene 



Pleistocene 



Pliocene 



Unknown 



Before or after Glacial 



EPOCH. 



Before glacial epoch. 



{de quo qiurritur) 

 Disputed. 



(rfe quo qufprititr) 

 Before glacial epoch, 

 ((/f quo quteritur) 



Before glacial epoch. 



Unknown. 



II 



Before glacial epoch. 



{dc quo q^uri-ilur) 

 Before glacial epoch. 



Unknown. 



* Lyell proposed this term " Pleistocene" for the Newer 

 Pliocene, as opposed to Post-pliocene, that is, equivalent to 

 before the drift as opposed to after it. The question as to the 

 remains found in these Pleistocene deposits is twofold : first, 

 the data of the deposit, — that is, whether it is Pleistocene or 

 not, — a question which I imagine must be answered in the 

 affirmative ; and second, how the bones came into the deposit. 



Tliey may belong to an older date, and have become mixed up 

 with more recent remains in the newest bed. 



t I do not know the original authority for this. Lyell does 

 not put it very strongly. He says, " Besides which a few 

 bones of a stag, horse, Megalonyx, and bison, arc slated to liave 

 been obtained, &a." — Lyell's " Travels in North America," 

 First Series, vol. ii. p. C), 1845. 



