CONTENTS. 
•ART. l._Urimlella gracilis, a fresh-water Polyzoan. By Prof. Joseph Leidy, (Plate I.) 5 
•A UT. « I— The Terrestrial Mollusca inhabiting the Society Islands. By Andrew J. Garrett. 
(Plates II and III.) , 
•ART. III.— The Tertiary Geology of the Eastern and Southern United States. By Prof 
Angelo Iledprin. (Plate IV.) . . . _ - 
•Extra coi)ie.s printed in advance for the Authors! 
