n 



THE EXTINCT MAMMALIAN FAUNA 



OF 



DAKOTA AND NEBRASKA, 



INCLUDING AN ACCOUNT OP SOME ALLIED FORMS FROM OTHER LOCALITIES, 



TOGETHER WITH A 



SYN OPSIS 



OF THE 



MAMMALIAN EEMAINS OF NORTH AMERICA, 



ILLUSTRATED WITH 30 PLATES. 



BY JOSEPH LEIDY, M.D., LL.D., 



PnOFESaOR OF ANATOMY IN THE UNIVERSITY OP PENNSTIVANIA ; CURATOR OF THE ACADEMY OP NATURAL SCIENCES, PHILA- 

 DELPHIA ; MEMBER OF THE NAT. ACAD. OF SCIENCES; AMER. PHILOS. SOC, PHILADA. ; AMEB. ACAD. ARTS AND SCI., AND 

 THE NAT. HIST. SOC, BOSTON; LYC. NAT. HIST., NEW YORK; ACAD. OF SCIENCES, ST. LOUIS.; IMP. SOC. OP NATURALISTS, 

 MOSCOW ; IMP. LEOP. CAROL. ACAD. SCI., JENA ; ROY. ZOOL.-BOT. SOC, VIENNA; ROY. ACAD. SCI., MUNICH ; ROY. BOHEM, SOC. 

 SCI., PRAGUE; BIOLOGICAL SOC, PARIS; GEOLOGICAL AND ZOOLOGICAL SOCIETIES, LONDON ; NAT. UIST. SOC, DUBLIN ; ETC. 



PRECEDED WITH AN INTRODUCTION 



ON THE 



GEOLOGY OF THE TERTIARY^ FORMATIONS OF 



DAKOTA AND NEBRASKA, 



ACCOMPANIED WITH A iMAP. 

 BY F. V. HATDEI^, M. D., 



PROFESSOR OP MINERALOGY AND GEnLOGV IN THE UNIVERSITY OP PENNSYLVANIA; U. S. OEOLOGIST ; UEMBEn OF THE AMER. 

 PHILOS. SOC, AND ACAD. NAT. SCI., PUILAUA. ; NAT. HIST. SOC, BOSTON; LYC NAT. HIST., NEW YORK ; ACAD. SCI., ST. LOUIS; 

 ACAD. SCI., CHICAGO ; ESSEX INST. NAT. HIST., SALEM, MASS., ETC. 



r II I L A DE LPn I A, 18G0. 



