CONTENTS. 



Page. 



No. 1. The Quaternary of Southern California, by Oscar IT. Hershey. 1 

 No. 2. Oolemanite from Southern California, by Arthur S. Eakle. . . . 31 

 No. 3. The Eparchaean Interval. A criticism of the use of the term 



Algonkian, by Andrew ('!. Lawson 51 



No. 4. Triassic Ichthyopterygia from California and Nevada, by John 



C. Merriam 63 



No. .1. A Contribution to the Petrography of the John Day Basin, by 



Frank C. Calkins 109 



No. 6. The Igneous RocKs near Pajaro, by John A. Keid 173 



No. 7. Minerals from Leona Heights, Alameda County, California, by 



Walclemar T. Schaller 191 



No. 8. Plumasite, an Oligoclase-Corundum Eock, near Spanish Peak, 



California, by Andrew C. Lawson 219 



No. 9. Palacheite, by Arthur S. Eakle 231 



No. 10. Two New Species of Fossil Turtles from Oregon, by O. P. Hay 237 

 No. 11. A New Tortoise from the Auriferous Gravels of California, 



by W. J. Sinclair 243 



No. 12. New Iehthyosauria from the Upper Triassic of California, by 



John C. Merriam 249 



No. 13. Spodumene from San Diego County, California, by Waldemar 



T. Schaller 265 



No. 14. The Pliocene and Quaternary Canidae of the Great Valley of 



California, by John C. Merriam 277 



No. I-!. The Geomorphogeny of the Upper Kern Basin, by Andrew C. 



Lawson 291 



No. 16. A Note on the Fauna of the Lower Miocene in California, by 



John C. Merriam 377 



No. 17. The Orbicular Gabbro at Dehesa, San Diego County, Cali- 

 fornia, by Andrew C. Lawson 383 



No. 18. A New Cestraciont Spine from the Lower Triassic of Idaho, by 



Herbert M. Evans 397 



No. 19. A Fossil Egg from Arizona, by Wm. Conger Morgan and 



Marion Clover Tallmon 403 



No. 20. Euceratherium, a New Ungulate from the Quaternary Caves 



of California, by William J. Sinclair and E. L. Furlong. . 411 

 No. 21. A New Marine Beptile from the Triassic. of California, by 



John C. Merriam 419 



No. 22. The Eiver Terraces of the Orleans Basin, California, by Oscar 



H. Hershey 423 



Index 477 



MAPS. 



Geological Reconnaissance Sketch Map of Southern California 2 



Upper Kern Basin and Adjacent Mountains 306 



