

Li 



PR A NS ACTION S 



OF THE 



AMERICAN PHILOSOPHICAL SOCIETY, 



;ld AT PHILADELPHIA, 



FOR PROMOTING USEFUL KNOWLEDGE 



VOLUME XX.-NEW SERIES. 



PART 1. 



Article [.—The History of the Pel 



lycosa 



una, wit 



h a De 



iption of the Genus Dimetrodon, Cope. By 



G. Baur and E. C. Case. 



T II E A M E R I . C A N P II I L S P H I A L S C I E T Y 

 104 S. Fifth Street. 



899. 



