Branner— Fossil Remains of Mammals in Brazil. 133 



Aet. XI. — The Occurrence of Fossil Remains of Mam- 

 mals in the Interior of the States of Pernambuco and 

 Alagoas ) Brazil ; by John C. Bkanner. With Plate I. 



The following observations, upon a region whose geology is 

 but little known, were made on a trip from Pao d'Assncar in 

 the State of Alagoas on the lower course of the Rio Sao 

 Francisco to Aguas Bellas in the State of Pernambuco. It 

 has long been hoped that these observations might be extended 

 in the held, and that a study might be made of the collections 

 of Pleistocene mammalian remains in the Museu Nacional at 

 Pio de Janeiro, but it now seems improbable that either will 

 shortly be done. This fragment is, therefore, published in the 

 hope that it may be of service in directing attention to and 

 arousing interest in the subject. 



SKETCH MAP Of 



„ p-U of 



ALAGOAS-PERNAMBUCO 



The Rio Sao Francisco between the falls of Paulo Alfonso 

 and Pao d'Assucar runs through a narrow channel cut in a 

 plain of crystalline rocks — schists, gneisses and granites. The 

 plain is a hilly one rising to an average height of fifty and 

 sixty meters above the river, apparently an ancient baselevel. 

 Upstream the plain extends to and beyond Piranhas, the head 

 of navigation on the lower river. The accompanying illustra- 



