S6& Pampean Formation ; paet n. 



(see his work ' Buenos Ayres,' &c. p. 171). 1 have seen the tooth 

 of a Mastodon from the Salado ; a little northward of this river, 

 on the borders of a lake near the G. del Monte, I saw many bones, 

 and one large piece of dermal armour : higher up the Salado, there 

 is a place called Monte ' Huesos.' On the Matanzas. about twenty 

 miles south of Buenos Ayres, the skeleton (vide p. 178, of ' Buenos 

 Ayres,' &c. by Sir W. Parish) of a Glyptodon was found about 

 five feet beneath the surface ; here also (see " Cat. of Royal College 

 of Surgeons ') remains of Glyptodon clavipes, G. ornatus, and G. 

 reticulatus were found. Signor Angelis, in a letter which I have 

 seen, refers to some great remains found in Buenos Ayres, at a 

 depth of twenty varas from the surface. Seven leagues north of 

 this city the same author found the skeletons of Mylodon robustus 

 and Glyptodon ornatus. From this neighbourhood he has lately 

 sent to the British Museum the following fossils : — Remains of 

 three or four individuals of Megatherium : of three species of 

 Glyptodon; of three individuals of the Mastodon Andium; of 

 Macrauchenia ; of a second species of Toxodon, different from T. 

 Platensis : and, lastly, of the Machairodus, a wonderful large car- 

 nivorous animal. M. d'Orbigny has lately received from the Reco- 

 late (' Voyage/ Pal. p. 144), near Buenos Ayres, a tooth of Toxodon 

 Platensis. 



Proceeding northward, along the west bank of the Parana, we 

 come to the Rio Luxan, where two skeletons of the Megatherium 

 have been found ; and lately, within eight leagues of the town of 

 Luxan, Dr. F. X. Muniz has collected (' British Packet,' Buenos 

 Ayres, September 25th, 1841), from an average depth of eighteen 

 feet, very numerous remains, of no less than, as he believes, nine 

 distinct species of mammifers. At Areco, large bones have been 

 found, which are believed, by the inhabitants, to have been changed 

 from small bones by the water of the river ! At Arrecifes, the 

 Glyptodon, sent to the College of Surgeons, was found ; and I 

 have seen two teeth of a Mastodon from this quarter. At S. 

 Nicolas, M. d'Orbigny found remains of a Canis, Ctenomys, and 

 Kerodon ; and M. Isabelle (' Voyage,' p. 332) refers to a gigantic 

 Armadillo found there. At S. Carlos I heard of great bones. A 

 little below the mouth of the Carcarana, the two skeletons of 

 Mastodon were found ; on the banks of this river, near S. Miguel, 

 I found teeth of the Mastodon and Toxodon ; and ' Falkner ' 

 (p. 55) describes the osseous armour of some great animal ; I heard 

 of many other bones in this neighbourhood. I have seen, I may 

 add, in the possession of Mr. Caldcleugh, the tooth of a Mastodon 

 Andiinn. said to have been found in Paraguay ; I may here also refer 

 to a statement in this gentleman's travels (vol. i. p. 48), of a great 

 skeleton having been found in the province of Bolivia in Brazil, on 

 the R. de las Contas. The farthest point westward in the Pampas, 

 at which I have heard of fossil bones, was high up on the banks of 

 the R. Quinto. 



In Entre Rios, besides the remains of the Mastodon, Toxodon, 



