$4.60 per Year (Foreign). 



AMERICAN 

 NATURALIST 



A MONTHLY JOURNAL 



DEVOTED TO THE NATURAL SCIENCES 



IN THEIR WIDEST SENSE. 



CONTENTS. 



- 



■ 



-:■..,.•- ' ;:...', ]. .'.-... :,ri- 



tion— Petrographical Notes J 



- \ v . ■-. <■■ ;•,,.. , ;■ ;: ;:- 



tilian Order Cotylosaiiria. (Illustrate.] -The 



" ■■.'«•: • .;■ -,i : ... ■ . -. 



k ■■■■:■:. --K ; • -.-. ' . 



!- i! 



; 



lu-'riror't ..f'i. :•'»,; 



PHILADELPHIA, U. S. A. 



THE EDWARDS & DOCKER CO. 



518 and 520 MINOR STREET. 



