CONTENTS 



PAGE 



No. 1. Lower and Middle Cambrian Formations of the Mohave Desert, by 



Clifton W. Clark 1 



No. 2. Notes on Peccary Remains from Rancho La Brea, by John C. 



Merriam and Chester Stock 9 



No. 3. Note on an Hipparion Tooth from ' the Siestan Deposits of the 



Berkeley Hills, California, by Chester Stock 19 



No. 4. Pinnipeds from Miocene and Pleistocene Deposits of California. 



A Description of a New Genus and Species of Sea Lion from the 

 Temblor together with Seal Remains from the Santa Margarita 

 and San Pedro Formations and a Resume of Current Theories 

 regarding Origin of Pinnipedia, by Remington Kellogg 23 



No. 5. The Briones Formation of Middle California, by Parker D. Trask.... 133 



No. 6. Geology of the Cuyamaca Region of California, by F. S. Hudson 175 



No. 7. Genesis of the Ores of the Cobalt District, Ontario, Canada, by 



Alfred R. Whitman 253 



No. 8. A Marsupial from the John Day Oligocene of Logan Butte, Eastern 



Oregon, by Chester Stock and Eustace L. Furlong 311 



No. 9. Geology of San Bernardino Mountains North of San Gorgonio Pass, 



by Francis Edward Vaughan 319 



No. 10. New Species from the Cretaceous of the Santa Ana Mountains, 



California, by E. L. Packard 413 



Index 415 



