PREFACE 



The following pages contain papers relating to the Palajontologv of 

 California, and may be considered supplementary to the volumes on that 

 subject published by the State Geological Survey, under Prof. J. D. "Whit- 

 ney, as well as to Part I of the Catalogue of Californian Fossils, published 

 in the Seventh Annual Report of the State Mineralogist. While little 

 attention has been devoted to this branch of science by the State Min- 

 ing Bureau, as compared with more practical matters, it is thought that 

 the contributions thus made deserve to be published. The collections 

 were made by assistants of the Bureau, mainly by W. L. Watts, H. W. 

 Fairbanks, and Dr. Stephen Bowers. Some interesting specimens were 

 also contributed by Mrs. N. Barton Williams. 



J. G. COOPER. 

 San Francisco, September, 1894. 



