PARTE IT 
MESOSAURUS BRASILIENSIS nov. sp. 
DO 
Permiano do Brasil 
POR 
J. H. Mac GreGor 
DA 
COLUMBIA UNIVERSITY, NEW YORK 
PART II 
On MESOSAURUS BRASILIENSIS nov. sp. 
FROM TIE 
Permian of Brasil 
BY 
J. H. Mac GrecGor 
COLUMBIA UNIVERSITY, NEW YORK 
