CONTENTS. 
_—SNo. 1. THE AURIFEROUS GRAVELS OF THE SIERRA NEVADA OF CALIFORNIA. 
B By J. D. Waitney. pp. xvi and 569. With 24 Plates and 2 Folded Maps, one of 
which is in 2 sheets. Part I. including pp. 1-288, May. 1879; Part Il., pp 288-569, 
September, 1880. 
No. 2. A REPORT ON THE FOSSIL PLANTS OF THE AURIFEROUS GRAVEL 
DEPOSITS OF THE SIERRA NEVADA. By Leo Lesquerevx. pp. 62. With 
10 Double Plates. 1878. 
