X1J CONTENTS. 



No. XVII] . 



Description of a Fragment of the Head of a New Fossil Animal, discov- 

 ered in a Marl Pit, near Moorestown, New Jersey. By Isaac Hays, 

 M.D. ------ 471 



No. XIX. 



Description of a New Genus and New Species of Extinct Mammiferous 



Quadruped. By John D. Godman, M.D. - - - 473 



Donations, &c. - - - 487 



